91914640862 has 32 divisors (see below), whose sum is σ = 151939666944. Its totient is φ = 41353696800.

The previous prime is 91914640847. The next prime is 91914640889. The reversal of 91914640862 is 26804641919.

It is a self number, because there is not a number n which added to its sum of digits gives 91914640862.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5296043 + ... + 5313369.

It is an arithmetic number, because the mean of its divisors is an integer number (4748114592).

Almost surely, 2^91914640862 is an apocalyptic number.

91914640862 is a deficient number, since it is larger than the sum of its proper divisors (60025026082).

91914640862 is a wasteful number, since it uses less digits than its factorization.

91914640862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19784.

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 91914640862 in words is "ninety-one billion, nine hundred fourteen million, six hundred forty thousand, eight hundred sixty-two".