7956864857 has 8 divisors (see below), whose sum is σ = 7995440640. Its totient is φ = 7918352640.

The previous prime is 7956864791. The next prime is 7956864887. The reversal of 7956864857 is 7584686597.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7956864857 - 2¹⁶ = 7956799321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7956864793 and 7956864802.

It is not an unprimeable number, because it can be changed into a prime (7956864887) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 245369 + ... + 275897.

It is an arithmetic number, because the mean of its divisors is an integer number (999430080).

Almost surely, 2^7956864857 is an apocalyptic number.

It is an amenable number.

7956864857 is a deficient number, since it is larger than the sum of its proper divisors (38575783).

7956864857 is a wasteful number, since it uses less digits than its factorization.

7956864857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31783.

The product of its digits is 101606400, while the sum is 65.

The square root of 7956864857 is about 89201.2604002881. The cubic root of 7956864857 is about 1996.3989247701.

The spelling of 7956864857 in words is "seven billion, nine hundred fifty-six million, eight hundred sixty-four thousand, eight hundred fifty-seven".