90188492054 has 16 divisors (see below), whose sum is σ = 136949445360. Its totient is φ = 44538969120.

The previous prime is 90188491993. The next prime is 90188492063. The reversal of 90188492054 is 45029488109.

It is a super-2 number, since 2×90188492054² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90188491993 and 90188492011.

It is a congruent number.

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, 563192 + ... + 705380.

It is an arithmetic number, because the mean of its divisors is an integer number (8559340335).

Almost surely, 2^90188492054 is an apocalyptic number.

90188492054 is a deficient number, since it is larger than the sum of its proper divisors (46760953306).

90188492054 is a wasteful number, since it uses less digits than its factorization.

90188492054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146095.

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 90188492054 in words is "ninety billion, one hundred eighty-eight million, four hundred ninety-two thousand, fifty-four".