91951520044 has 24 divisors (see below), whose sum is σ = 161368901568. Its totient is φ = 45846237840.

The previous prime is 91951520021. The next prime is 91951520159. The reversal of 91951520044 is 44002515919.

It is a junction number, because it is equal to n+sod(n) for n = 91951519979 and 91951520006.

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 7 ways as a sum of consecutive naturals, for example, 3365599 + ... + 3392809.

It is an arithmetic number, because the mean of its divisors is an integer number (6723704232).

Almost surely, 2^91951520044 is an apocalyptic number.

It is an amenable number.

91951520044 is a deficient number, since it is larger than the sum of its proper divisors (69417381524).

91951520044 is a wasteful number, since it uses less digits than its factorization.

91951520044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29565 (or 29563 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 91951520044 in words is "ninety-one billion, nine hundred fifty-one million, five hundred twenty thousand, forty-four".