91725023506 has 32 divisors (see below), whose sum is σ = 150728352768. Its totient is φ = 41675627520.

The previous prime is 91725023501. The next prime is 91725023531. The reversal of 91725023506 is 60532052719.

It is not an unprimeable number, because it can be changed into a prime (91725023501) 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, 355891 + ... + 556873.

It is an arithmetic number, because the mean of its divisors is an integer number (4710261024).

Almost surely, 2^91725023506 is an apocalyptic number.

91725023506 is a deficient number, since it is larger than the sum of its proper divisors (59003329262).

91725023506 is a wasteful number, since it uses less digits than its factorization.

91725023506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201466.

The product of its (nonzero) digits is 113400, while the sum is 40.

The spelling of 91725023506 in words is "ninety-one billion, seven hundred twenty-five million, twenty-three thousand, five hundred six".