86557670028 has 18 divisors (see below), whose sum is σ = 218798554884. Its totient is φ = 28852556664.

The previous prime is 86557670021. The next prime is 86557670141. The reversal of 86557670028 is 82007675568.

86557670028 is a `hidden beast` number, since 8 + 6 + 557 + 67 + 0 + 0 + 28 = 666.

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

It is a super-2 number, since 2×86557670028² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86557670021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1202189826 + ... + 1202189897.

Almost surely, 2^86557670028 is an apocalyptic number.

It is an amenable number.

86557670028 is an abundant number, since it is smaller than the sum of its proper divisors (132240884856).

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

86557670028 is a wasteful number, since it uses less digits than its factorization.

86557670028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404379733 (or 2404379728 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 54.

The spelling of 86557670028 in words is "eighty-six billion, five hundred fifty-seven million, six hundred seventy thousand, twenty-eight".