90668445747 has 16 divisors (see below), whose sum is σ = 132005491968. Its totient is φ = 54898858080.

The previous prime is 90668445737. The next prime is 90668445761. The reversal of 90668445747 is 74754486609.

It is not a de Polignac number, because 90668445747 - 2²⁸ = 90400010291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90668445737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1257268 + ... + 1327425.

It is an arithmetic number, because the mean of its divisors is an integer number (8250343248).

Almost surely, 2^90668445747 is an apocalyptic number.

90668445747 is a deficient number, since it is larger than the sum of its proper divisors (41337046221).

90668445747 is a wasteful number, since it uses less digits than its factorization.

90668445747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585770.

The product of its (nonzero) digits is 40642560, while the sum is 60.

The spelling of 90668445747 in words is "ninety billion, six hundred sixty-eight million, four hundred forty-five thousand, seven hundred forty-seven".