99378736515 has 64 divisors (see below), whose sum is σ = 182030551680. Its totient is φ = 51418644480.

The previous prime is 99378736481. The next prime is 99378736519. The reversal of 99378736515 is 51563787399.

99378736515 is a `hidden beast` number, since 9 + 9 + 3 + 7 + 87 + 36 + 515 = 666.

It is not a de Polignac number, because 99378736515 - 2⁶ = 99378736451 is a prime.

It is a super-2 number, since 2×99378736515² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99378736519) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 518499 + ... + 683811.

It is an arithmetic number, because the mean of its divisors is an integer number (2844227370).

Almost surely, 2^99378736515 is an apocalyptic number.

99378736515 is a deficient number, since it is larger than the sum of its proper divisors (82651815165).

99378736515 is a wasteful number, since it uses less digits than its factorization.

99378736515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165461 (or 165455 counting only the distinct ones).

The product of its digits is 42865200, while the sum is 63.

The spelling of 99378736515 in words is "ninety-nine billion, three hundred seventy-eight million, seven hundred thirty-six thousand, five hundred fifteen".