78715715099 has 8 divisors (see below), whose sum is σ = 91435585248. Its totient is φ = 66364536960.

The previous prime is 78715715081. The next prime is 78715715101. The reversal of 78715715099 is 99051751787.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78715715099 - 2⁸ = 78715714843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78715712099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92172542 + ... + 92173395.

It is an arithmetic number, because the mean of its divisors is an integer number (11429448156).

Almost surely, 2^78715715099 is an apocalyptic number.

78715715099 is a deficient number, since it is larger than the sum of its proper divisors (12719870149).

78715715099 is a wasteful number, since it uses less digits than its factorization.

78715715099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184346005.

The product of its (nonzero) digits is 5556600, while the sum is 59.

The spelling of 78715715099 in words is "seventy-eight billion, seven hundred fifteen million, seven hundred fifteen thousand, ninety-nine".