91392513856 has 84 divisors (see below), whose sum is σ = 213637368000. Its totient is φ = 38672315136.

The previous prime is 91392513827. The next prime is 91392513899. The reversal of 91392513856 is 65831529319.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 63295 + ... + 432193.

It is an arithmetic number, because the mean of its divisors is an integer number (2543302000).

Almost surely, 2^91392513856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91392513856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106818684000).

91392513856 is an abundant number, since it is smaller than the sum of its proper divisors (122244854144).

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

91392513856 is a wasteful number, since it uses less digits than its factorization.

91392513856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369004 (or 368987 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 52.

The spelling of 91392513856 in words is "ninety-one billion, three hundred ninety-two million, five hundred thirteen thousand, eight hundred fifty-six".