90186549868 has 24 divisors (see below), whose sum is σ = 161690138064. Its totient is φ = 43989561600.

The previous prime is 90186549851. The next prime is 90186549883. The reversal of 90186549868 is 86894568109.

It is a super-2 number, since 2×90186549868² (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 7 ways as a sum of consecutive naturals, for example, 2956671 + ... + 2987017.

It is an arithmetic number, because the mean of its divisors is an integer number (6737089086).

Almost surely, 2^90186549868 is an apocalyptic number.

It is an amenable number.

90186549868 is a deficient number, since it is larger than the sum of its proper divisors (71503588196).

90186549868 is a wasteful number, since it uses less digits than its factorization.

90186549868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48513 (or 48511 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 64.

The spelling of 90186549868 in words is "ninety billion, one hundred eighty-six million, five hundred forty-nine thousand, eight hundred sixty-eight".