91830931980 has 48 divisors (see below), whose sum is σ = 257206247424. Its totient is φ = 24480664000.

The previous prime is 91830931961. The next prime is 91830931981. The reversal of 91830931980 is 8913903819.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 40332 + ... + 430451.

It is an arithmetic number, because the mean of its divisors is an integer number (5358463488).

Almost surely, 2^91830931980 is an apocalyptic number.

It is an amenable number.

91830931980 is an abundant number, since it is smaller than the sum of its proper divisors (165375315444).

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

91830931980 is a wasteful number, since it uses less digits than its factorization.

91830931980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474046 (or 474044 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 51.

The spelling of 91830931980 in words is "ninety-one billion, eight hundred thirty million, nine hundred thirty-one thousand, nine hundred eighty".