78625235815 has 16 divisors (see below), whose sum is σ = 108677947392. Its totient is φ = 53489921184.

The previous prime is 78625235813. The next prime is 78625235827. The reversal of 78625235815 is 51853252687.

It is not a de Polignac number, because 78625235815 - 2¹ = 78625235813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78625235813) 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, 8839789 + ... + 8848678.

It is an arithmetic number, because the mean of its divisors is an integer number (6792371712).

Almost surely, 2^78625235815 is an apocalyptic number.

78625235815 is a deficient number, since it is larger than the sum of its proper divisors (30052711577).

78625235815 is a wasteful number, since it uses less digits than its factorization.

78625235815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17688606.

The product of its digits is 4032000, while the sum is 52.

The spelling of 78625235815 in words is "seventy-eight billion, six hundred twenty-five million, two hundred thirty-five thousand, eight hundred fifteen".