80561505672 has 48 divisors (see below), whose sum is σ = 219140239500. Its totient is φ = 26736564096.

The previous prime is 80561505643. The next prime is 80561505709. The reversal of 80561505672 is 27650516508.

80561505672 is a `hidden beast` number, since 80 + 5 + 6 + 1 + 5 + 0 + 567 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 79554458916 + 1007046756 = 282054^2 + 31734^2 .

It is a super-2 number, since 2×80561505672² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2426547 + ... + 2459522.

Almost surely, 2^80561505672 is an apocalyptic number.

It is an amenable number.

80561505672 is an abundant number, since it is smaller than the sum of its proper divisors (138578733828).

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

80561505672 is a wasteful number, since it uses less digits than its factorization.

80561505672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4886310 (or 4886303 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The spelling of 80561505672 in words is "eighty billion, five hundred sixty-one million, five hundred five thousand, six hundred seventy-two".