91471265279 has 4 divisors (see below), whose sum is σ = 92970794280. Its totient is φ = 89971736280.

The previous prime is 91471265267. The next prime is 91471265317. The reversal of 91471265279 is 97256217419.

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

It is a cyclic number.

It is not a de Polignac number, because 91471265279 - 2²⁴ = 91454488063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91471265279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91471265239) 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, 749764409 + ... + 749764530.

It is an arithmetic number, because the mean of its divisors is an integer number (23242698570).

Almost surely, 2^91471265279 is an apocalyptic number.

91471265279 is a deficient number, since it is larger than the sum of its proper divisors (1499529001).

91471265279 is a wasteful number, since it uses less digits than its factorization.

91471265279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499529000.

The product of its digits is 1905120, while the sum is 53.

The spelling of 91471265279 in words is "ninety-one billion, four hundred seventy-one million, two hundred sixty-five thousand, two hundred seventy-nine".