91914640955 has 4 divisors (see below), whose sum is σ = 110297569152. Its totient is φ = 73531712760.

The previous prime is 91914640949. The next prime is 91914640967. The reversal of 91914640955 is 55904641919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55904641919 = 7 ⋅7986377417.

It is not a de Polignac number, because 91914640955 - 2²⁸ = 91646205499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91914640897 and 91914640906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9191464091 + ... + 9191464100.

It is an arithmetic number, because the mean of its divisors is an integer number (27574392288).

Almost surely, 2^91914640955 is an apocalyptic number.

91914640955 is a deficient number, since it is larger than the sum of its proper divisors (18382928197).

91914640955 is a wasteful number, since it uses less digits than its factorization.

91914640955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18382928196.

The product of its (nonzero) digits is 1749600, while the sum is 53.

The spelling of 91914640955 in words is "ninety-one billion, nine hundred fourteen million, six hundred forty thousand, nine hundred fifty-five".