90031320575 has 24 divisors (see below), whose sum is σ = 127989805152. Its totient is φ = 61540974720.

The previous prime is 90031320539. The next prime is 90031320593. The reversal of 90031320575 is 57502313009.

It is a happy number.

It is not a de Polignac number, because 90031320575 - 2¹⁰ = 90031319551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 755984 + ... + 866933.

It is an arithmetic number, because the mean of its divisors is an integer number (5332908548).

Almost surely, 2^90031320575 is an apocalyptic number.

90031320575 is a deficient number, since it is larger than the sum of its proper divisors (37958484577).

90031320575 is a wasteful number, since it uses less digits than its factorization.

90031320575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623251 (or 1623246 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 35.

The spelling of 90031320575 in words is "ninety billion, thirty-one million, three hundred twenty thousand, five hundred seventy-five".