99646891968 has 112 divisors (see below), whose sum is σ = 284109521696. Its totient is φ = 30641172480.

The previous prime is 99646891957. The next prime is 99646891973. The reversal of 99646891968 is 86919864699.

It is a self number, because there is not a number n which added to its sum of digits gives 99646891968.

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, 4213938 + ... + 4237518.

It is an arithmetic number, because the mean of its divisors is an integer number (2536692158).

Almost surely, 2^99646891968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99646891968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142054760848).

99646891968 is an abundant number, since it is smaller than the sum of its proper divisors (184462629728).

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

99646891968 is a wasteful number, since it uses less digits than its factorization.

99646891968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25302 (or 25292 counting only the distinct ones).

The product of its digits is 362797056, while the sum is 75.

The spelling of 99646891968 in words is "ninety-nine billion, six hundred forty-six million, eight hundred ninety-one thousand, nine hundred sixty-eight".