78715158015 has 32 divisors (see below), whose sum is σ = 135819081216. Its totient is φ = 38698704000.

The previous prime is 78715158013. The next prime is 78715158029. The reversal of 78715158015 is 51085151787.

It is not a de Polignac number, because 78715158015 - 2¹ = 78715158013 is a prime.

It is a super-2 number, since 2×78715158015² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78715158013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135861 + ... + 419390.

It is an arithmetic number, because the mean of its divisors is an integer number (4244346288).

Almost surely, 2^78715158015 is an apocalyptic number.

78715158015 is a deficient number, since it is larger than the sum of its proper divisors (57103923201).

78715158015 is a wasteful number, since it uses less digits than its factorization.

78715158015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555999.

The product of its (nonzero) digits is 392000, while the sum is 48.

The spelling of 78715158015 in words is "seventy-eight billion, seven hundred fifteen million, one hundred fifty-eight thousand, fifteen".