99976607640 has 768 divisors, whose sum is σ = 436768588800. Its totient is φ = 19848830976.

The previous prime is 99976607639. The next prime is 99976607651. The reversal of 99976607640 is 4670667999.

99976607640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 21717579 + ... + 21722181.

It is an arithmetic number, because the mean of its divisors is an integer number (568709100).

Almost surely, 2^99976607640 is an apocalyptic number.

99976607640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99976607640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218384294400).

99976607640 is an abundant number, since it is smaller than the sum of its proper divisors (336791981160).

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

99976607640 is a wasteful number, since it uses less digits than its factorization.

99976607640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4673 (or 4650 counting only the distinct ones).

The product of its (nonzero) digits is 30862944, while the sum is 63.

The spelling of 99976607640 in words is "ninety-nine billion, nine hundred seventy-six million, six hundred seven thousand, six hundred forty".