91455464550 has 48 divisors (see below), whose sum is σ = 226991610000. Its totient is φ = 24368547840.

The previous prime is 91455464533. The next prime is 91455464579. The reversal of 91455464550 is 5546455419.

It is a self number, because there is not a number n which added to its sum of digits gives 91455464550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56727 + ... + 431426.

It is an arithmetic number, because the mean of its divisors is an integer number (4728991875).

Almost surely, 2^91455464550 is an apocalyptic number.

91455464550 is an abundant number, since it is smaller than the sum of its proper divisors (135536145450).

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

91455464550 is a wasteful number, since it uses less digits than its factorization.

91455464550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489417 (or 489412 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 48.

The spelling of 91455464550 in words is "ninety-one billion, four hundred fifty-five million, four hundred sixty-four thousand, five hundred fifty".