90632513491 has 16 divisors (see below), whose sum is σ = 108784922400. Its totient is φ = 74595368448.

The previous prime is 90632513483. The next prime is 90632513501. The reversal of 90632513491 is 19431523609.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 90632513491 - 2³ = 90632513483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90632513401) 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, 10787956 + ... + 10796353.

It is an arithmetic number, because the mean of its divisors is an integer number (6799057650).

Almost surely, 2^90632513491 is an apocalyptic number.

90632513491 is a deficient number, since it is larger than the sum of its proper divisors (18152408909).

90632513491 is a wasteful number, since it uses less digits than its factorization.

90632513491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21584358.

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 90632513491 in words is "ninety billion, six hundred thirty-two million, five hundred thirteen thousand, four hundred ninety-one".