7920657159 has 4 divisors (see below), whose sum is σ = 10560876216. Its totient is φ = 5280438104.

The previous prime is 7920657149. The next prime is 7920657163. The reversal of 7920657159 is 9517560297.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7920657159 - 2⁹ = 7920656647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7920657109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1320109524 + ... + 1320109529.

It is an arithmetic number, because the mean of its divisors is an integer number (2640219054).

Almost surely, 2^7920657159 is an apocalyptic number.

7920657159 is a deficient number, since it is larger than the sum of its proper divisors (2640219057).

7920657159 is a wasteful number, since it uses less digits than its factorization.

7920657159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640219056.

The product of its (nonzero) digits is 1190700, while the sum is 51.

The square root of 7920657159 is about 88998.0739061245. The cubic root of 7920657159 is about 1993.3661167085.

The spelling of 7920657159 in words is "seven billion, nine hundred twenty million, six hundred fifty-seven thousand, one hundred fifty-nine".