91272044520507 has 4 divisors (see below), whose sum is σ = 121696059360680. Its totient is φ = 60848029680336.

The previous prime is 91272044520469. The next prime is 91272044520523. The reversal of 91272044520507 is 70502544027219.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 91272044520507 - 2³¹ = 91269897036859 is a prime.

It is a super-2 number, since 2×91272044520507² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91272044520557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15212007420082 + ... + 15212007420087.

It is an arithmetic number, because the mean of its divisors is an integer number (30424014840170).

Almost surely, 2^{91272044520507} is an apocalyptic number.

91272044520507 is a deficient number, since it is larger than the sum of its proper divisors (30424014840173).

91272044520507 is a wasteful number, since it uses less digits than its factorization.

91272044520507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30424014840172.

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 91272044520507 in words is "ninety-one trillion, two hundred seventy-two billion, forty-four million, five hundred twenty thousand, five hundred seven".