11515663306456 has 16 divisors (see below), whose sum is σ = 21895979527440. Its totient is φ = 5676735432480.

The previous prime is 11515663306453. The next prime is 11515663306529. The reversal of 11515663306456 is 65460336651511.

It is a super-2 number, since 2×11515663306456² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11515663306453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10137026991 + ... + 10137028126.

It is an arithmetic number, because the mean of its divisors is an integer number (1368498720465).

Almost surely, 2^{11515663306456} is an apocalyptic number.

It is an amenable number.

11515663306456 is a deficient number, since it is larger than the sum of its proper divisors (10380316220984).

11515663306456 is a wasteful number, since it uses less digits than its factorization.

11515663306456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20274055194 (or 20274055190 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 52.

Adding to 11515663306456 its reverse (65460336651511), we get a palindrome (76975999957967).

The spelling of 11515663306456 in words is "eleven trillion, five hundred fifteen billion, six hundred sixty-three million, three hundred six thousand, four hundred fifty-six".