90565954389 has 32 divisors (see below), whose sum is σ = 138233226240. Its totient is φ = 58559962176.

The previous prime is 90565954379. The next prime is 90565954417. The reversal of 90565954389 is 98345956509.

90565954389 is a `hidden beast` number, since 9 + 0 + 5 + 6 + 5 + 9 + 543 + 89 = 666.

It is not a de Polignac number, because 90565954389 - 2⁵ = 90565954357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90565954379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173692 + ... + 459674.

It is an arithmetic number, because the mean of its divisors is an integer number (4319788320).

Almost surely, 2^90565954389 is an apocalyptic number.

It is an amenable number.

90565954389 is a deficient number, since it is larger than the sum of its proper divisors (47667271851).

90565954389 is a wasteful number, since it uses less digits than its factorization.

90565954389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286346 (or 286340 counting only the distinct ones).

The product of its (nonzero) digits is 52488000, while the sum is 63.

The spelling of 90565954389 in words is "ninety billion, five hundred sixty-five million, nine hundred fifty-four thousand, three hundred eighty-nine".