80438432856 has 64 divisors (see below), whose sum is σ = 208071763200. Its totient is φ = 25883088000.

The previous prime is 80438432839. The next prime is 80438432861. The reversal of 80438432856 is 65823483408.

It is a junction number, because it is equal to n+sod(n) for n = 80438432799 and 80438432808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5178141 + ... + 5193651.

It is an arithmetic number, because the mean of its divisors is an integer number (3251121300).

Almost surely, 2^80438432856 is an apocalyptic number.

It is an amenable number.

80438432856 is an abundant number, since it is smaller than the sum of its proper divisors (127633330344).

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

80438432856 is a wasteful number, since it uses less digits than its factorization.

80438432856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23000 (or 22996 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 51.

The spelling of 80438432856 in words is "eighty billion, four hundred thirty-eight million, four hundred thirty-two thousand, eight hundred fifty-six".