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99999999808 = 2610127675591
BaseRepresentation
bin101110100100001110…
…1101110011101000000
3100120010011122022222121
41131020131232131000
53114244444443213
6113534523014024
710140043654642
oct1351035563500
9316104568877
1099999999808
1139456435a45
121746996a314
13957880c627
144ba9060892
15290423988d
hex174876e740

99999999808 has 56 divisors (see below), whose sum is σ = 200510509824. Its totient is φ = 49478208000.

The previous prime is 99999999769. The next prime is 99999999821. The reversal of 99999999808 is 80899999999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17883093 + ... + 17888683.

Almost surely, 299999999808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99999999808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100255254912).

99999999808 is an abundant number, since it is smaller than the sum of its proper divisors (100510510016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99999999808 is a wasteful number, since it uses less digits than its factorization.

99999999808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8471 (or 8461 counting only the distinct ones).

The product of its (nonzero) digits is 2754990144, while the sum is 88.

The spelling of 99999999808 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred eight".

Divisors: 1 2 4 8 16 32 64 101 202 404 808 1616 2767 3232 5534 5591 6464 11068 11182 22136 22364 44272 44728 88544 89456 177088 178912 279467 357824 558934 564691 1117868 1129382 2235736 2258764 4471472 4517528 8942944 9035056 15470297 17885888 18070112 30940594 36140224 61881188 123762376 247524752 495049504 990099008 1562499997 3124999994 6249999988 12499999976 24999999952 49999999904 99999999808