99547388640 has 576 divisors, whose sum is σ = 411407942400. Its totient is φ = 22410888192.

The previous prime is 99547388621. The next prime is 99547388651. The reversal of 99547388640 is 4688374599.

99547388640 is a `hidden beast` number, since 9 + 9 + 547 + 3 + 8 + 86 + 4 + 0 = 666.

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 95 ways as a sum of consecutive naturals, for example, 14179051 + ... + 14186069.

It is an arithmetic number, because the mean of its divisors is an integer number (714249900).

Almost surely, 2^99547388640 is an apocalyptic number.

99547388640 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 99547388640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205703971200).

99547388640 is an abundant number, since it is smaller than the sum of its proper divisors (311860553760).

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

99547388640 is a wasteful number, since it uses less digits than its factorization.

99547388640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7124 (or 7103 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 99547388640 in words is "ninety-nine billion, five hundred forty-seven million, three hundred eighty-eight thousand, six hundred forty".