80428857815556 has 288 divisors, whose sum is σ = 225346293139968. Its totient is φ = 24078555832320.

The previous prime is 80428857815519. The next prime is 80428857815557. The reversal of 80428857815556 is 65551875882408.

80428857815556 is a `hidden beast` number, since 8 + 0 + 4 + 2 + 8 + 8 + 57 + 8 + 15 + 556 = 666.

It is not an unprimeable number, because it can be changed into a prime (80428857815557) 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 95 ways as a sum of consecutive naturals, for example, 1996575391 + ... + 1996615673.

It is an arithmetic number, because the mean of its divisors is an integer number (782452406736).

Almost surely, 2^{80428857815556} 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 80428857815556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112673146569984).

80428857815556 is an abundant number, since it is smaller than the sum of its proper divisors (144917435324412).

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

80428857815556 is a wasteful number, since it uses less digits than its factorization.

80428857815556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42091 (or 42086 counting only the distinct ones).

The product of its (nonzero) digits is 860160000, while the sum is 72.

The spelling of 80428857815556 in words is "eighty trillion, four hundred twenty-eight billion, eight hundred fifty-seven million, eight hundred fifteen thousand, five hundred fifty-six".