99373547520 has 616 divisors, whose sum is σ = 385087347036. Its totient is φ = 24461180928.

The previous prime is 99373547477. The next prime is 99373547521. The reversal of 99373547520 is 2574537399.

99373547520 is a `hidden beast` number, since 9 + 9 + 3 + 73 + 5 + 47 + 520 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 92493840384 + 6879707136 = 304128^2 + 82944^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (99373547521) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 7644119034 + ... + 7644119046.

Almost surely, 2^99373547520 is an apocalyptic number.

99373547520 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 99373547520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192543673518).

99373547520 is an abundant number, since it is smaller than the sum of its proper divisors (285713799516).

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

99373547520 is an frugal number, since it uses more digits than its factorization.

99373547520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 7144200, while the sum is 54.

The spelling of 99373547520 in words is "ninety-nine billion, three hundred seventy-three million, five hundred forty-seven thousand, five hundred twenty".