80807856738 has 64 divisors (see below), whose sum is σ = 187648665600. Its totient is φ = 22720528512.

The previous prime is 80807856713. The next prime is 80807856791. The reversal of 80807856738 is 83765870808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2892963 + ... + 2920761.

It is an arithmetic number, because the mean of its divisors is an integer number (2932010400).

Almost surely, 2^80807856738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80807856738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93824332800).

80807856738 is an abundant number, since it is smaller than the sum of its proper divisors (106840808862).

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

80807856738 is a wasteful number, since it uses less digits than its factorization.

80807856738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28911.

The product of its (nonzero) digits is 18063360, while the sum is 60.

The spelling of 80807856738 in words is "eighty billion, eight hundred seven million, eight hundred fifty-six thousand, seven hundred thirty-eight".