915990655247 has 2 divisors, whose sum is σ = 915990655248. Its totient is φ = 915990655246.

The previous prime is 915990655211. The next prime is 915990655271. The reversal of 915990655247 is 742556099519.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 915990655247 - 2²⁶ = 915923546383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 915990655247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (915990655297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457995327623 + 457995327624.

It is an arithmetic number, because the mean of its divisors is an integer number (457995327624).

Almost surely, 2^915990655247 is an apocalyptic number.

915990655247 is a deficient number, since it is larger than the sum of its proper divisors (1).

915990655247 is an equidigital number, since it uses as much as digits as its factorization.

915990655247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618000, while the sum is 62.

The spelling of 915990655247 in words is "nine hundred fifteen billion, nine hundred ninety million, six hundred fifty-five thousand, two hundred forty-seven".