91397256230 has 64 divisors (see below), whose sum is σ = 199171768320. Its totient is φ = 29478864384.

The previous prime is 91397256199. The next prime is 91397256287. The reversal of 91397256230 is 3265279319.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2647259 + ... + 2681561.

It is an arithmetic number, because the mean of its divisors is an integer number (3112058880).

Almost surely, 2^91397256230 is an apocalyptic number.

91397256230 is an abundant number, since it is smaller than the sum of its proper divisors (107774512090).

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

91397256230 is a wasteful number, since it uses less digits than its factorization.

91397256230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36573.

The product of its (nonzero) digits is 612360, while the sum is 47.

The spelling of 91397256230 in words is "ninety-one billion, three hundred ninety-seven million, two hundred fifty-six thousand, two hundred thirty".