91275729415 has 16 divisors (see below), whose sum is σ = 117979495200. Its totient is φ = 67390376832.

The previous prime is 91275729403. The next prime is 91275729427. The reversal of 91275729415 is 51492757219.

It is an interprime number because it is at equal distance from previous prime (91275729403) and next prime (91275729427).

It is a cyclic number.

It is not a de Polignac number, because 91275729415 - 2³⁵ = 56915991047 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201976 + ... + 472594.

It is an arithmetic number, because the mean of its divisors is an integer number (7373718450).

Almost surely, 2^91275729415 is an apocalyptic number.

91275729415 is a deficient number, since it is larger than the sum of its proper divisors (26703765785).

91275729415 is a wasteful number, since it uses less digits than its factorization.

91275729415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275826.

The product of its digits is 1587600, while the sum is 52.

The spelling of 91275729415 in words is "ninety-one billion, two hundred seventy-five million, seven hundred twenty-nine thousand, four hundred fifteen".