91830931984 has 20 divisors (see below), whose sum is σ = 194097197520. Its totient is φ = 41741332640.

The previous prime is 91830931981. The next prime is 91830931987. The reversal of 91830931984 is 48913903819.

It is an interprime number because it is at equal distance from previous prime (91830931981) and next prime (91830931987).

It is not an unprimeable number, because it can be changed into a prime (91830931981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260883154 + ... + 260883505.

It is an arithmetic number, because the mean of its divisors is an integer number (9704859876).

Almost surely, 2^91830931984 is an apocalyptic number.

It is an amenable number.

91830931984 is an abundant number, since it is smaller than the sum of its proper divisors (102266265536).

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

91830931984 is a wasteful number, since it uses less digits than its factorization.

91830931984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521766678 (or 521766672 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 55.

The spelling of 91830931984 in words is "ninety-one billion, eight hundred thirty million, nine hundred thirty-one thousand, nine hundred eighty-four".