915641651 has 2 divisors, whose sum is σ = 915641652. Its totient is φ = 915641650.

The previous prime is 915641647. The next prime is 915641653. The reversal of 915641651 is 156146519.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 915641651 - 2² = 915641647 is a prime.

It is a Sophie Germain prime.

Together with 915641653, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (915641653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457820825 + 457820826.

It is an arithmetic number, because the mean of its divisors is an integer number (457820826).

Almost surely, 2^915641651 is an apocalyptic number.

915641651 is a deficient number, since it is larger than the sum of its proper divisors (1).

915641651 is an equidigital number, since it uses as much as digits as its factorization.

915641651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 38.

The square root of 915641651 is about 30259.5712296126. The cubic root of 915641651 is about 971.0505679293.

The spelling of 915641651 in words is "nine hundred fifteen million, six hundred forty-one thousand, six hundred fifty-one".