91851953320 has 32 divisors (see below), whose sum is σ = 209156865120. Its totient is φ = 36298120000.

The previous prime is 91851953299. The next prime is 91851953321. The reversal of 91851953320 is 2335915819.

It is not an unprimeable number, because it can be changed into a prime (91851953321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13829806 + ... + 13836445.

It is an arithmetic number, because the mean of its divisors is an integer number (6536152035).

Almost surely, 2^91851953320 is an apocalyptic number.

It is an amenable number.

91851953320 is an abundant number, since it is smaller than the sum of its proper divisors (117304911800).

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

91851953320 is a wasteful number, since it uses less digits than its factorization.

91851953320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27666345 (or 27666341 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 46.

The spelling of 91851953320 in words is "ninety-one billion, eight hundred fifty-one million, nine hundred fifty-three thousand, three hundred twenty".