91904608811 has 8 divisors (see below), whose sum is σ = 95928253344. Its totient is φ = 87883280320.

The previous prime is 91904608801. The next prime is 91904608813. The reversal of 91904608811 is 11880640919.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91904608811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91904608813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497666 + ... + 656871.

It is an arithmetic number, because the mean of its divisors is an integer number (11991031668).

Almost surely, 2^91904608811 is an apocalyptic number.

91904608811 is a deficient number, since it is larger than the sum of its proper divisors (4023644533).

91904608811 is a wasteful number, since it uses less digits than its factorization.

91904608811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158021.

The product of its (nonzero) digits is 124416, while the sum is 47.

The spelling of 91904608811 in words is "ninety-one billion, nine hundred four million, six hundred eight thousand, eight hundred eleven".