7957008257 has 4 divisors (see below), whose sum is σ = 8680372656. Its totient is φ = 7233643860.

The previous prime is 7957008247. The next prime is 7957008277. The reversal of 7957008257 is 7528007597.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7957008257 - 2⁶ = 7957008193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7957008247) 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, 361682183 + ... + 361682204.

It is an arithmetic number, because the mean of its divisors is an integer number (2170093164).

Almost surely, 2^7957008257 is an apocalyptic number.

It is an amenable number.

7957008257 is a deficient number, since it is larger than the sum of its proper divisors (723364399).

7957008257 is a wasteful number, since it uses less digits than its factorization.

7957008257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723364398.

The product of its (nonzero) digits is 1234800, while the sum is 50.

The square root of 7957008257 is about 89202.0641969680. The cubic root of 7957008257 is about 1996.4109178474.

The spelling of 7957008257 in words is "seven billion, nine hundred fifty-seven million, eight thousand, two hundred fifty-seven".