78331386125 has 12 divisors (see below), whose sum is σ = 97761475188. Its totient is φ = 62662605600.

The previous prime is 78331386031. The next prime is 78331386163. The reversal of 78331386125 is 52168313387.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 6 ways, for example, as 60721830724 + 17609555401 = 246418^2 + 132701^2 .

It is a de Polignac number, because none of the positive numbers 2^k-78331386125 is a prime.

It is a super-2 number, since 2×78331386125² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78331386125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3116609 + ... + 3141641.

It is an arithmetic number, because the mean of its divisors is an integer number (8146789599).

Almost surely, 2^78331386125 is an apocalyptic number.

It is an amenable number.

78331386125 is a deficient number, since it is larger than the sum of its proper divisors (19430089063).

78331386125 is an frugal number, since it uses more digits than its factorization.

78331386125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50081 (or 25038 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The spelling of 78331386125 in words is "seventy-eight billion, three hundred thirty-one million, three hundred eighty-six thousand, one hundred twenty-five".