915750091961 has 2 divisors, whose sum is σ = 915750091962. Its totient is φ = 915750091960.

The previous prime is 915750091951. The next prime is 915750091969. The reversal of 915750091961 is 169190057519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 562267524025 + 353482567936 = 749845^2 + 594544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-915750091961 is a prime.

It is not a weakly prime, because it can be changed into another prime (915750091969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457875045980 + 457875045981.

It is an arithmetic number, because the mean of its divisors is an integer number (457875045981).

Almost surely, 2^915750091961 is an apocalyptic number.

It is an amenable number.

915750091961 is a deficient number, since it is larger than the sum of its proper divisors (1).

915750091961 is an equidigital number, since it uses as much as digits as its factorization.

915750091961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 765450, while the sum is 53.

The spelling of 915750091961 in words is "nine hundred fifteen billion, seven hundred fifty million, ninety-one thousand, nine hundred sixty-one".