90549749868 has 48 divisors (see below), whose sum is σ = 214521425664. Its totient is φ = 29720940480.

The previous prime is 90549749831. The next prime is 90549749887. The reversal of 90549749868 is 86894794509.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2131273 + ... + 2173343.

It is an arithmetic number, because the mean of its divisors is an integer number (4469196368).

Almost surely, 2^90549749868 is an apocalyptic number.

It is an amenable number.

90549749868 is an abundant number, since it is smaller than the sum of its proper divisors (123971675796).

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

90549749868 is a wasteful number, since it uses less digits than its factorization.

90549749868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44822 (or 44820 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 69.

The spelling of 90549749868 in words is "ninety billion, five hundred forty-nine million, seven hundred forty-nine thousand, eight hundred sixty-eight".