91477815063 has 16 divisors (see below), whose sum is σ = 122606477280. Its totient is φ = 60667858944.

The previous prime is 91477815059. The next prime is 91477815067. The reversal of 91477815063 is 36051877419.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91477815059) and next prime (91477815067).

It is not a de Polignac number, because 91477815063 - 2² = 91477815059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91477814997 and 91477815015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91477815067) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 458895 + ... + 627327.

It is an arithmetic number, because the mean of its divisors is an integer number (7662904830).

Almost surely, 2^91477815063 is an apocalyptic number.

91477815063 is a deficient number, since it is larger than the sum of its proper divisors (31128662217).

91477815063 is a wasteful number, since it uses less digits than its factorization.

91477815063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169378.

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 91477815063 in words is "ninety-one billion, four hundred seventy-seven million, eight hundred fifteen thousand, sixty-three".