78830972715 has 32 divisors (see below), whose sum is σ = 138186487296. Its totient is φ = 38057020160.

The previous prime is 78830972713. The next prime is 78830972723. The reversal of 78830972715 is 51727903887.

It is not a de Polignac number, because 78830972715 - 2¹ = 78830972713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78830972711) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 986799 + ... + 1063688.

It is an arithmetic number, because the mean of its divisors is an integer number (4318327728).

Almost surely, 2^78830972715 is an apocalyptic number.

78830972715 is a deficient number, since it is larger than the sum of its proper divisors (59355514581).

78830972715 is a wasteful number, since it uses less digits than its factorization.

78830972715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050739.

The product of its (nonzero) digits is 5927040, while the sum is 57.

The spelling of 78830972715 in words is "seventy-eight billion, eight hundred thirty million, nine hundred seventy-two thousand, seven hundred fifteen".