91913233677 has 12 divisors (see below), whose sum is σ = 124283031264. Its totient is φ = 60409545840.

The previous prime is 91913233663. The next prime is 91913233697. The reversal of 91913233677 is 77633231919.

It is a happy number.

It is not a de Polignac number, because 91913233677 - 2⁴ = 91913233661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91913233637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4414263 + ... + 4435035.

It is an arithmetic number, because the mean of its divisors is an integer number (10356919272).

Almost surely, 2^91913233677 is an apocalyptic number.

It is an amenable number.

91913233677 is a deficient number, since it is larger than the sum of its proper divisors (32369797587).

91913233677 is an frugal number, since it uses more digits than its factorization.

91913233677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41620 (or 20847 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 51.

The spelling of 91913233677 in words is "ninety-one billion, nine hundred thirteen million, two hundred thirty-three thousand, six hundred seventy-seven".