11565157215 has 16 divisors (see below), whose sum is σ = 19478160000. Its totient is φ = 5843447712.

The previous prime is 11565157211. The next prime is 11565157267. The reversal of 11565157215 is 51275156511.

It is a happy number.

It is not a de Polignac number, because 11565157215 - 2² = 11565157211 is a prime.

It is a super-2 number, since 2×11565157215² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11565157211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20289465 + ... + 20290034.

It is an arithmetic number, because the mean of its divisors is an integer number (1217385000).

Almost surely, 2^11565157215 is an apocalyptic number.

11565157215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11565157215 is a deficient number, since it is larger than the sum of its proper divisors (7913002785).

11565157215 is a wasteful number, since it uses less digits than its factorization.

11565157215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40579526.

The product of its digits is 52500, while the sum is 39.

The spelling of 11565157215 in words is "eleven billion, five hundred sixty-five million, one hundred fifty-seven thousand, two hundred fifteen".