7657117568 has 32 divisors (see below), whose sum is σ = 15267827160. Its totient is φ = 3825192448.

The previous prime is 7657117561. The next prime is 7657117571. The reversal of 7657117568 is 8657117567.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7657117561) 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, 123146 + ... + 174582.

Almost surely, 2^7657117568 is an apocalyptic number.

It is an amenable number.

7657117568 is a deficient number, since it is larger than the sum of its proper divisors (7610709592).

7657117568 is a wasteful number, since it uses less digits than its factorization.

7657117568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52614 (or 52602 counting only the distinct ones).

The product of its digits is 2469600, while the sum is 53.

The square root of 7657117568 is about 87504.9573909959. The cubic root of 7657117568 is about 1971.0082334214.

Subtracting 7657117568 from its reverse (8657117567), we obtain a palindrome (999999999).

The spelling of 7657117568 in words is "seven billion, six hundred fifty-seven million, one hundred seventeen thousand, five hundred sixty-eight".