99750752640 has 1024 divisors, whose sum is σ = 448042752000. Its totient is φ = 20371046400.

The previous prime is 99750752623. The next prime is 99750752641. The reversal of 99750752640 is 4625705799.

99750752640 is a `hidden beast` number, since 9 + 9 + 75 + 0 + 7 + 526 + 40 = 666.

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 (99750752641) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 81163546 + ... + 81164774.

It is an arithmetic number, because the mean of its divisors is an integer number (437541750).

Almost surely, 2^99750752640 is an apocalyptic number.

99750752640 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 99750752640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224021376000).

99750752640 is an abundant number, since it is smaller than the sum of its proper divisors (348291999360).

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

99750752640 is a wasteful number, since it uses less digits than its factorization.

99750752640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336 (or 1318 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 54.

The spelling of 99750752640 in words is "ninety-nine billion, seven hundred fifty million, seven hundred fifty-two thousand, six hundred forty".