99655857387 has 96 divisors (see below), whose sum is σ = 159280902144. Its totient is φ = 62152790400.

The previous prime is 99655857383. The next prime is 99655857391. The reversal of 99655857387 is 78375855699.

99655857387 is a `hidden beast` number, since 9 + 9 + 6 + 5 + 585 + 7 + 38 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (99655857383) and next prime (99655857391).

It is not a de Polignac number, because 99655857387 - 2² = 99655857383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99655857383) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 46545337 + ... + 46547477.

It is an arithmetic number, because the mean of its divisors is an integer number (1659176064).

Almost surely, 2^99655857387 is an apocalyptic number.

99655857387 is a deficient number, since it is larger than the sum of its proper divisors (59625044757).

99655857387 is a wasteful number, since it uses less digits than its factorization.

99655857387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391 (or 2379 counting only the distinct ones).

The product of its digits is 571536000, while the sum is 72.

The spelling of 99655857387 in words is "ninety-nine billion, six hundred fifty-five million, eight hundred fifty-seven thousand, three hundred eighty-seven".