91928451580 has 48 divisors (see below), whose sum is σ = 220864061376. Its totient is φ = 31484643840.

The previous prime is 91928451569. The next prime is 91928451631. The reversal of 91928451580 is 8515482919.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219211 + ... + 481570.

It is an arithmetic number, because the mean of its divisors is an integer number (4601334612).

Almost surely, 2^91928451580 is an apocalyptic number.

It is an amenable number.

91928451580 is an abundant number, since it is smaller than the sum of its proper divisors (128935609796).

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

91928451580 is a wasteful number, since it uses less digits than its factorization.

91928451580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701734 (or 701732 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 52.

The spelling of 91928451580 in words is "ninety-one billion, nine hundred twenty-eight million, four hundred fifty-one thousand, five hundred eighty".