7939664915 has 16 divisors (see below), whose sum is σ = 11726275008. Its totient is φ = 5025545856.

The previous prime is 7939664911. The next prime is 7939664917. The reversal of 7939664915 is 5194669397.

It is a cyclic number.

It is not a de Polignac number, because 7939664915 - 2² = 7939664911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7939664911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8724452 + ... + 8725361.

It is an arithmetic number, because the mean of its divisors is an integer number (732892188).

Almost surely, 2^7939664915 is an apocalyptic number.

7939664915 is a deficient number, since it is larger than the sum of its proper divisors (3786610093).

7939664915 is a wasteful number, since it uses less digits than its factorization.

7939664915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17449838.

The product of its digits is 11022480, while the sum is 59.

The square root of 7939664915 is about 89104.7973736544. The cubic root of 7939664915 is about 1994.9593830128.

The spelling of 7939664915 in words is "seven billion, nine hundred thirty-nine million, six hundred sixty-four thousand, nine hundred fifteen".