11515649 has 2 divisors, whose sum is σ = 11515650. Its totient is φ = 11515648.

The previous prime is 11515633. The next prime is 11515657. The reversal of 11515649 is 94651511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11343424 + 172225 = 3368^2 + 415^2 .

It is a cyclic number.

It is not a de Polignac number, because 11515649 - 2⁴ = 11515633 is a prime.

It is a super-2 number, since 2×11515649² = 265220343782402, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11515619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757824 + 5757825.

It is an arithmetic number, because the mean of its divisors is an integer number (5757825).

Almost surely, 2^11515649 is an apocalyptic number.

It is an amenable number.

11515649 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515649 is an equidigital number, since it uses as much as digits as its factorization.

11515649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 32.

The square root of 11515649 is about 3393.4715263282. The cubic root of 11515649 is about 225.8202096860.

The spelling of 11515649 in words is "eleven million, five hundred fifteen thousand, six hundred forty-nine".