80861805252 has 60 divisors (see below), whose sum is σ = 217101972780. Its totient is φ = 26225446464.

The previous prime is 80861805223. The next prime is 80861805263. The reversal of 80861805252 is 25250816808.

80861805252 is a `hidden beast` number, since 8 + 0 + 8 + 618 + 0 + 5 + 25 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 43544838276 + 37316966976 = 208674^2 + 193176^2 .

It is a super-2 number, since 2×80861805252² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80861805198 and 80861805207.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3360627 + ... + 3384602.

It is an arithmetic number, because the mean of its divisors is an integer number (3618366213).

Almost surely, 2^80861805252 is an apocalyptic number.

It is an amenable number.

80861805252 is an abundant number, since it is smaller than the sum of its proper divisors (136240167528).

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

80861805252 is a wasteful number, since it uses less digits than its factorization.

80861805252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6745282 (or 6745271 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The spelling of 80861805252 in words is "eighty billion, eight hundred sixty-one million, eight hundred five thousand, two hundred fifty-two".