80040287556 has 18 divisors (see below), whose sum is σ = 202324060302. Its totient is φ = 26680095840.

The previous prime is 80040287549. The next prime is 80040287609. The reversal of 80040287556 is 65578204008.

It can be written as a sum of positive squares in only one way, i.e., 77302905156 + 2737382400 = 278034^2 + 52320^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1111670625 + ... + 1111670696.

Almost surely, 2^80040287556 is an apocalyptic number.

It is an amenable number.

80040287556 is an abundant number, since it is smaller than the sum of its proper divisors (122283772746).

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

80040287556 is a wasteful number, since it uses less digits than its factorization.

80040287556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223341331 (or 2223341326 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 80040287556 in words is "eighty billion, forty million, two hundred eighty-seven thousand, five hundred fifty-six".