91859911056 has 75 divisors (see below), whose sum is σ = 265900816731. Its totient is φ = 30616333344.

The previous prime is 91859911037. The next prime is 91859911067. The reversal of 91859911056 is 65011995819.

The square root of 91859911056 is 303084.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 91859910993 and 91859911011.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 10906815 + ... + 10915233.

Almost surely, 2^91859911056 is an apocalyptic number.

91859911056 is the 303084-th square number.

It is an amenable number.

91859911056 is an abundant number, since it is smaller than the sum of its proper divisors (174040905675).

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

91859911056 is an frugal number, since it uses more digits than its factorization.

91859911056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16858 (or 8424 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 54.

The spelling of 91859911056 in words is "ninety-one billion, eight hundred fifty-nine million, nine hundred eleven thousand, fifty-six".