90446571432 has 128 divisors (see below), whose sum is σ = 287221555200. Its totient is φ = 25833816000.

The previous prime is 90446571427. The next prime is 90446571487. The reversal of 90446571432 is 23417564409.

90446571432 is a `hidden beast` number, since 9 + 0 + 4 + 46 + 571 + 4 + 32 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6208557 + ... + 6223107.

It is an arithmetic number, because the mean of its divisors is an integer number (2243918400).

Almost surely, 2^90446571432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90446571432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143610777600).

90446571432 is an abundant number, since it is smaller than the sum of its proper divisors (196774983768).

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

90446571432 is a wasteful number, since it uses less digits than its factorization.

90446571432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18684 (or 18674 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 90446571432 in words is "ninety billion, four hundred forty-six million, five hundred seventy-one thousand, four hundred thirty-two".