90113231578272 has 96 divisors (see below), whose sum is σ = 270417631881600. Its totient is φ = 25739215008768.

The previous prime is 90113231578241. The next prime is 90113231578277. The reversal of 90113231578272 is 27287513231109.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (90113231578277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16996747 + ... + 21659082.

It is an arithmetic number, because the mean of its divisors is an integer number (2816850332100).

Almost surely, 2^{90113231578272} is an apocalyptic number.

It is an amenable number.

90113231578272 is an abundant number, since it is smaller than the sum of its proper divisors (180304400303328).

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

90113231578272 is a wasteful number, since it uses less digits than its factorization.

90113231578272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38659318 (or 38659310 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 90113231578272 in words is "ninety trillion, one hundred thirteen billion, two hundred thirty-one million, five hundred seventy-eight thousand, two hundred seventy-two".