91477815067 has 2 divisors, whose sum is σ = 91477815068. Its totient is φ = 91477815066.

The previous prime is 91477815059. The next prime is 91477815119. The reversal of 91477815067 is 76051877419.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91477815067 - 2³ = 91477815059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91477814999 and 91477815017.

It is not a weakly prime, because it can be changed into another prime (91477815047) 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 as a sum of consecutive naturals, namely, 45738907533 + 45738907534.

It is an arithmetic number, because the mean of its divisors is an integer number (45738907534).

Almost surely, 2^91477815067 is an apocalyptic number.

91477815067 is a deficient number, since it is larger than the sum of its proper divisors (1).

91477815067 is an equidigital number, since it uses as much as digits as its factorization.

91477815067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2963520, while the sum is 55.

The spelling of 91477815067 in words is "ninety-one billion, four hundred seventy-seven million, eight hundred fifteen thousand, sixty-seven".