91235885456 has 10 divisors (see below), whose sum is σ = 176769528102. Its totient is φ = 45617942720.

The previous prime is 91235885443. The next prime is 91235885537. The reversal of 91235885456 is 65458853219.

It can be written as a sum of positive squares in only one way, i.e., 57033081856 + 34202803600 = 238816^2 + 184940^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2851121405 + ... + 2851121436.

Almost surely, 2^91235885456 is an apocalyptic number.

It is an amenable number.

91235885456 is a deficient number, since it is larger than the sum of its proper divisors (85533642646).

91235885456 is a wasteful number, since it uses less digits than its factorization.

91235885456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5702242849 (or 5702242843 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 56.

The spelling of 91235885456 in words is "ninety-one billion, two hundred thirty-five million, eight hundred eighty-five thousand, four hundred fifty-six".