78572858015 has 16 divisors (see below), whose sum is σ = 96554148768. Its totient is φ = 61359182976.

The previous prime is 78572857999. The next prime is 78572858017. The reversal of 78572858015 is 51085827587.

It is a cyclic number.

It is not a de Polignac number, because 78572858015 - 2⁴ = 78572857999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78572858017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 700337 + ... + 804746.

It is an arithmetic number, because the mean of its divisors is an integer number (6034634298).

Almost surely, 2^78572858015 is an apocalyptic number.

78572858015 is a deficient number, since it is larger than the sum of its proper divisors (17981290753).

78572858015 is a wasteful number, since it uses less digits than its factorization.

78572858015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505338.

The product of its (nonzero) digits is 6272000, while the sum is 56.

The spelling of 78572858015 in words is "seventy-eight billion, five hundred seventy-two million, eight hundred fifty-eight thousand, fifteen".