8078694657 has 16 divisors (see below), whose sum is σ = 11769841920. Its totient is φ = 4888256400.

The previous prime is 8078694647. The next prime is 8078694667. The reversal of 8078694657 is 7564968708.

It is an interprime number because it is at equal distance from previous prime (8078694647) and next prime (8078694667).

It is not a de Polignac number, because 8078694657 - 2⁴ = 8078694641 is a prime.

It is a super-2 number, since 2×8078694657² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8078694657.

It is not an unprimeable number, because it can be changed into a prime (8078694647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177319 + ... + 218172.

It is an arithmetic number, because the mean of its divisors is an integer number (735615120).

Almost surely, 2^8078694657 is an apocalyptic number.

It is an amenable number.

8078694657 is a deficient number, since it is larger than the sum of its proper divisors (3691147263).

8078694657 is a wasteful number, since it uses less digits than its factorization.

8078694657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396124.

The product of its (nonzero) digits is 20321280, while the sum is 60.

The square root of 8078694657 is about 89881.5590485612. The cubic root of 8078694657 is about 2006.5365018818.

The spelling of 8078694657 in words is "eight billion, seventy-eight million, six hundred ninety-four thousand, six hundred fifty-seven".