90765999225 has 144 divisors (see below), whose sum is σ = 194060704320. Its totient is φ = 41418432000.

The previous prime is 90765999217. The next prime is 90765999227. The reversal of 90765999225 is 52299956709.

It is not a de Polignac number, because 90765999225 - 2³ = 90765999217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90765999227) by changing a digit.

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 143 ways as a sum of consecutive naturals, for example, 1355790 + ... + 1421160.

It is an arithmetic number, because the mean of its divisors is an integer number (1347643780).

Almost surely, 2^90765999225 is an apocalyptic number.

It is an amenable number.

90765999225 is an abundant number, since it is smaller than the sum of its proper divisors (103294705095).

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

90765999225 is a wasteful number, since it uses less digits than its factorization.

90765999225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65429 (or 65407 counting only the distinct ones).

The product of its (nonzero) digits is 27556200, while the sum is 63.

The spelling of 90765999225 in words is "ninety billion, seven hundred sixty-five million, nine hundred ninety-nine thousand, two hundred twenty-five".