91532745507 has 16 divisors (see below), whose sum is σ = 140859447552. Its totient is φ = 51786559200.

The previous prime is 91532745503. The next prime is 91532745511. The reversal of 91532745507 is 70554723519.

It is an interprime number because it is at equal distance from previous prime (91532745503) and next prime (91532745511).

It is not a de Polignac number, because 91532745507 - 2² = 91532745503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91532745503) 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, 21575613 + ... + 21579854.

It is an arithmetic number, because the mean of its divisors is an integer number (8803715472).

Almost surely, 2^91532745507 is an apocalyptic number.

91532745507 is a deficient number, since it is larger than the sum of its proper divisors (49326702045).

91532745507 is a wasteful number, since it uses less digits than its factorization.

91532745507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43155578.

The product of its (nonzero) digits is 1323000, while the sum is 48.

The spelling of 91532745507 in words is "ninety-one billion, five hundred thirty-two million, seven hundred forty-five thousand, five hundred seven".