91469559557 has 4 divisors (see below), whose sum is σ = 91484998176. Its totient is φ = 91454120940.

The previous prime is 91469559553. The next prime is 91469559589. The reversal of 91469559557 is 75595596419.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91469559557 - 2² = 91469559553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91469559493 and 91469559502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91469559553) 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, 7710419 + ... + 7722272.

It is an arithmetic number, because the mean of its divisors is an integer number (22871249544).

Almost surely, 2^91469559557 is an apocalyptic number.

It is an amenable number.

91469559557 is a deficient number, since it is larger than the sum of its proper divisors (15438619).

91469559557 is a wasteful number, since it uses less digits than its factorization.

91469559557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15438618.

The product of its digits is 76545000, while the sum is 65.

The spelling of 91469559557 in words is "ninety-one billion, four hundred sixty-nine million, five hundred fifty-nine thousand, five hundred fifty-seven".