90675144639 has 54 divisors (see below), whose sum is σ = 138933463760. Its totient is φ = 56973636720.

The previous prime is 90675144631. The next prime is 90675144689. The reversal of 90675144639 is 93644157609.

90675144639 is a `hidden beast` number, since 9 + 0 + 67 + 514 + 4 + 63 + 9 = 666.

It is not a de Polignac number, because 90675144639 - 2³ = 90675144631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90675144631) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 184674184 + ... + 184674674.

Almost surely, 2^90675144639 is an apocalyptic number.

90675144639 is a deficient number, since it is larger than the sum of its proper divisors (48258319121).

90675144639 is an equidigital number, since it uses as much as digits as its factorization.

90675144639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113 (or 596 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 90675144639 in words is "ninety billion, six hundred seventy-five million, one hundred forty-four thousand, six hundred thirty-nine".