99729787479520 has 96 divisors (see below), whose sum is σ = 257033063881440. Its totient is φ = 36265066506240.

The previous prime is 99729787479479. The next prime is 99729787479541. The reversal of 99729787479520 is 2597478792799.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343148026 + ... + 343438534.

It is an arithmetic number, because the mean of its divisors is an integer number (2677427748765).

Almost surely, 2^{99729787479520} is an apocalyptic number.

It is an amenable number.

99729787479520 is an abundant number, since it is smaller than the sum of its proper divisors (157303276401920).

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

99729787479520 is a wasteful number, since it uses less digits than its factorization.

99729787479520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485588 (or 485580 counting only the distinct ones).

The product of its (nonzero) digits is 10081895040, while the sum is 85.

The spelling of 99729787479520 in words is "ninety-nine trillion, seven hundred twenty-nine billion, seven hundred eighty-seven million, four hundred seventy-nine thousand, five hundred twenty".