91609600455 has 32 divisors (see below), whose sum is σ = 164050315200. Its totient is φ = 48501812736.

The previous prime is 91609600441. The next prime is 91609600501. The reversal of 91609600455 is 55400690619.

It is a happy number.

It is not a de Polignac number, because 91609600455 - 2¹¹ = 91609598407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 91609600455.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 2458110 + ... + 2495099.

It is an arithmetic number, because the mean of its divisors is an integer number (5126572350).

Almost surely, 2^91609600455 is an apocalyptic number.

91609600455 is a deficient number, since it is larger than the sum of its proper divisors (72440714745).

91609600455 is a wasteful number, since it uses less digits than its factorization.

91609600455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953360 (or 4953354 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 91609600455 in words is "ninety-one billion, six hundred nine million, six hundred thousand, four hundred fifty-five".