99758978893 has 16 divisors (see below), whose sum is σ = 121342250880. Its totient is φ = 80060829696.

The previous prime is 99758978831. The next prime is 99758978899. The reversal of 99758978893 is 39887985799.

It is a cyclic number.

It is not a de Polignac number, because 99758978893 - 2⁹ = 99758978381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99758978899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2148823 + ... + 2194756.

It is an arithmetic number, because the mean of its divisors is an integer number (7583890680).

Almost surely, 2^99758978893 is an apocalyptic number.

It is an amenable number.

99758978893 is a deficient number, since it is larger than the sum of its proper divisors (21583271987).

99758978893 is a wasteful number, since it uses less digits than its factorization.

99758978893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4343796.

The product of its digits is 2469035520, while the sum is 82.

The spelling of 99758978893 in words is "ninety-nine billion, seven hundred fifty-eight million, nine hundred seventy-eight thousand, eight hundred ninety-three".