91477815059 has 2 divisors, whose sum is σ = 91477815060. Its totient is φ = 91477815058.

The previous prime is 91477815053. The next prime is 91477815067. The reversal of 91477815059 is 95051877419.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91477815059 - 2⁴ = 91477815043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91477814995 and 91477815013.

It is not a weakly prime, because it can be changed into another prime (91477815053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45738907529 + 45738907530.

It is an arithmetic number, because the mean of its divisors is an integer number (45738907530).

Almost surely, 2^91477815059 is an apocalyptic number.

91477815059 is a deficient number, since it is larger than the sum of its proper divisors (1).

91477815059 is an equidigital number, since it uses as much as digits as its factorization.

91477815059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3175200, while the sum is 56.

The spelling of 91477815059 in words is "ninety-one billion, four hundred seventy-seven million, eight hundred fifteen thousand, fifty-nine".