10915378568649 has 27 divisors (see below), whose sum is σ = 15992882288877. Its totient is φ = 7173964690200.

The previous prime is 10915378568609. The next prime is 10915378568687. The reversal of 10915378568649 is 94686587351901.

The square root of 10915378568649 is 3303843.

It is a perfect power (a square), and thus also a powerful number.

10915378568649 is a `hidden beast` number, since 1 + 0 + 9 + 1 + 53 + 7 + 8 + 568 + 6 + 4 + 9 = 666.

It is not a de Polignac number, because 10915378568649 - 2¹⁵ = 10915378535881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10915378568609) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 703710804 + ... + 703726314.

Almost surely, 2^{10915378568649} is an apocalyptic number.

10915378568649 is the 3303843-rd square number.

10915378568649 is the 1651922-nd centered octagonal number.

It is an amenable number.

10915378568649 is a deficient number, since it is larger than the sum of its proper divisors (5077503720228).

10915378568649 is an frugal number, since it uses more digits than its factorization.

10915378568649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31170 (or 15585 counting only the distinct ones).

The product of its (nonzero) digits is 391910400, while the sum is 72.

The spelling of 10915378568649 in words is "ten trillion, nine hundred fifteen billion, three hundred seventy-eight million, five hundred sixty-eight thousand, six hundred forty-nine".