90857432812 has 24 divisors (see below), whose sum is σ = 168005376000. Its totient is φ = 42874080336.

The previous prime is 90857432801. The next prime is 90857432821. The reversal of 90857432812 is 21823475809.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2252812 + ... + 2292787.

It is an arithmetic number, because the mean of its divisors is an integer number (7000224000).

Almost surely, 2^90857432812 is an apocalyptic number.

It is an amenable number.

90857432812 is a deficient number, since it is larger than the sum of its proper divisors (77147943188).

90857432812 is a wasteful number, since it uses less digits than its factorization.

90857432812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4545885 (or 4545883 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 90857432812 in words is "ninety billion, eight hundred fifty-seven million, four hundred thirty-two thousand, eight hundred twelve".