90943642668 has 24 divisors (see below), whose sum is σ = 215680553200. Its totient is φ = 29817587520.

The previous prime is 90943642651. The next prime is 90943642681. The reversal of 90943642668 is 86624634909.

It is a happy number.

It is a super-2 number, since 2×90943642668² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

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, 62119243 + ... + 62120706.

Almost surely, 2^90943642668 is an apocalyptic number.

It is an amenable number.

90943642668 is an abundant number, since it is smaller than the sum of its proper divisors (124736910532).

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

90943642668 is a wasteful number, since it uses less digits than its factorization.

90943642668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124240017 (or 124240015 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 57.

The spelling of 90943642668 in words is "ninety billion, nine hundred forty-three million, six hundred forty-two thousand, six hundred sixty-eight".