99681715152 has 160 divisors (see below), whose sum is σ = 287541596160. Its totient is φ = 33063085440.

The previous prime is 99681715033. The next prime is 99681715153. The reversal of 99681715152 is 25151718699.

It is a happy number.

99681715152 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 (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99681715153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137113413 + ... + 137114139.

It is an arithmetic number, because the mean of its divisors is an integer number (1797134976).

Almost surely, 2^99681715152 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 99681715152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143770798080).

99681715152 is an abundant number, since it is smaller than the sum of its proper divisors (187859881008).

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

99681715152 is a wasteful number, since it uses less digits than its factorization.

99681715152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878 (or 1866 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 54.

The spelling of 99681715152 in words is "ninety-nine billion, six hundred eighty-one million, seven hundred fifteen thousand, one hundred fifty-two".