91642361658 has 16 divisors (see below), whose sum is σ = 183661083840. Its totient is φ = 30484727136.

The previous prime is 91642361633. The next prime is 91642361687. The reversal of 91642361658 is 85616324619.

It is a self number, because there is not a number n which added to its sum of digits gives 91642361658.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15678523 + ... + 15684366.

It is an arithmetic number, because the mean of its divisors is an integer number (11478817740).

Almost surely, 2^91642361658 is an apocalyptic number.

91642361658 is an abundant number, since it is smaller than the sum of its proper divisors (92018722182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91642361658 is a wasteful number, since it uses less digits than its factorization.

91642361658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31363381.

The product of its digits is 1866240, while the sum is 51.

The spelling of 91642361658 in words is "ninety-one billion, six hundred forty-two million, three hundred sixty-one thousand, six hundred fifty-eight".