78745725115 has 8 divisors (see below), whose sum is σ = 94497919488. Its totient is φ = 62994547200.

The previous prime is 78745725077. The next prime is 78745725139. The reversal of 78745725115 is 51152754787.

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

It is not a de Polignac number, because 78745725115 - 2²⁵ = 78712170683 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71782 + ... + 403291.

It is an arithmetic number, because the mean of its divisors is an integer number (11812239936).

Almost surely, 2^78745725115 is an apocalyptic number.

78745725115 is a deficient number, since it is larger than the sum of its proper divisors (15752194373).

78745725115 is a wasteful number, since it uses less digits than its factorization.

78745725115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508229.

The product of its digits is 2744000, while the sum is 52.

The spelling of 78745725115 in words is "seventy-eight billion, seven hundred forty-five million, seven hundred twenty-five thousand, one hundred fifteen".