10915378568609 has 2 divisors, whose sum is σ = 10915378568610. Its totient is φ = 10915378568608.

The previous prime is 10915378568599. The next prime is 10915378568687. The reversal of 10915378568609 is 90686587351901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9863820611584 + 1051557957025 = 3140672^2 + 1025455^2 .

It is a cyclic number.

It is not a de Polignac number, because 10915378568609 - 2²⁴ = 10915361791393 is a prime.

It is not a weakly prime, because it can be changed into another prime (10915378561609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5457689284304 + 5457689284305.

It is an arithmetic number, because the mean of its divisors is an integer number (5457689284305).

Almost surely, 2^{10915378568609} is an apocalyptic number.

It is an amenable number.

10915378568609 is a deficient number, since it is larger than the sum of its proper divisors (1).

10915378568609 is an equidigital number, since it uses as much as digits as its factorization.

10915378568609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97977600, while the sum is 68.

The spelling of 10915378568609 in words is "ten trillion, nine hundred fifteen billion, three hundred seventy-eight million, five hundred sixty-eight thousand, six hundred nine".