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80807838551 = 118599379127
BaseRepresentation
bin100101101000010000…
…1011100001101010111
321201120122012112011022
41023100201130031113
52310443301313201
6101042252231355
75560331203016
oct1132041341527
9251518175138
1080807838551
11312a7a11150
12137b246b55b
13780a6007ab
143ca8184a7d
15217e39341b
hex12d085c357

80807838551 has 16 divisors (see below), whose sum is σ = 88360500480. Its totient is φ = 73289810880.

The previous prime is 80807838523. The next prime is 80807838577. The reversal of 80807838551 is 15583870808.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2k-80807838551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80807838493 and 80807838502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80807838521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8849150 + ... + 8858276.

It is an arithmetic number, because the mean of its divisors is an integer number (5522531280).

Almost surely, 280807838551 is an apocalyptic number.

80807838551 is a deficient number, since it is larger than the sum of its proper divisors (7552661929).

80807838551 is a wasteful number, since it uses less digits than its factorization.

80807838551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10934.

The product of its (nonzero) digits is 2150400, while the sum is 53.

The spelling of 80807838551 in words is "eighty billion, eight hundred seven million, eight hundred thirty-eight thousand, five hundred fifty-one".

Divisors: 1 11 859 937 9127 9449 10307 100397 804883 7840093 8551999 8853713 86241023 94071989 7346167141 80807838551