90255291688 has 16 divisors (see below), whose sum is σ = 169654946580. Its totient is φ = 45013972608.

The previous prime is 90255291631. The next prime is 90255291697. The reversal of 90255291688 is 88619255209.

It can be written as a sum of positive squares in 2 ways, for example, as 77405255524 + 12850036164 = 278218^2 + 113358^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14205781 + ... + 14212132.

Almost surely, 2^90255291688 is an apocalyptic number.

It is an amenable number.

90255291688 is a deficient number, since it is larger than the sum of its proper divisors (79399654892).

90255291688 is a wasteful number, since it uses less digits than its factorization.

90255291688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28418316 (or 28418312 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 55.

The spelling of 90255291688 in words is "ninety billion, two hundred fifty-five million, two hundred ninety-one thousand, six hundred eighty-eight".