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80881620733 = 1921503197969
BaseRepresentation
bin100101101010011101…
…0111001011011111101
321201202210001001021201
41023110322321123331
52311121143330413
6101053445455501
75562215301304
oct1132472713375
9251683031251
1080881620733
1131335625861
1213813111591
13781c9949a4
143cb3cad43b
152185ab99dd
hex12d4eb96fd

80881620733 has 8 divisors (see below), whose sum is σ = 85142937600. Its totient is φ = 76620742848.

The previous prime is 80881620667. The next prime is 80881620739. The reversal of 80881620733 is 33702618808.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-80881620733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80881620739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309573 + ... + 507541.

It is an arithmetic number, because the mean of its divisors is an integer number (10642867200).

Almost surely, 280881620733 is an apocalyptic number.

It is an amenable number.

80881620733 is a deficient number, since it is larger than the sum of its proper divisors (4261316867).

80881620733 is a wasteful number, since it uses less digits than its factorization.

80881620733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219491.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 80881620733 in words is "eighty billion, eight hundred eighty-one million, six hundred twenty thousand, seven hundred thirty-three".

Divisors: 1 19 21503 197969 408557 3761411 4256927407 80881620733