91265684479 has 4 divisors (see below), whose sum is σ = 91698223480. Its totient is φ = 90833145480.

The previous prime is 91265684449. The next prime is 91265684507. The reversal of 91265684479 is 97448656219.

It is a happy number.

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 91265684479 - 2¹³ = 91265676287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91265684449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216269184 + ... + 216269605.

It is an arithmetic number, because the mean of its divisors is an integer number (22924555870).

Almost surely, 2^91265684479 is an apocalyptic number.

91265684479 is a deficient number, since it is larger than the sum of its proper divisors (432539001).

91265684479 is a wasteful number, since it uses less digits than its factorization.

91265684479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432539000.

The product of its digits is 26127360, while the sum is 61.

The spelling of 91265684479 in words is "ninety-one billion, two hundred sixty-five million, six hundred eighty-four thousand, four hundred seventy-nine".