11521655157013 has 32 divisors (see below), whose sum is σ = 11824428055680. Its totient is φ = 11224010772480.

The previous prime is 11521655157011. The next prime is 11521655157031. The reversal of 11521655157013 is 31075155612511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11521655157013 - 2¹ = 11521655157011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11521655157011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2552990245 + ... + 2552994757.

It is an arithmetic number, because the mean of its divisors is an integer number (369513376740).

Almost surely, 2^{11521655157013} is an apocalyptic number.

It is an amenable number.

11521655157013 is a deficient number, since it is larger than the sum of its proper divisors (302772898667).

11521655157013 is a wasteful number, since it uses less digits than its factorization.

11521655157013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117.

The product of its (nonzero) digits is 157500, while the sum is 43.

The spelling of 11521655157013 in words is "eleven trillion, five hundred twenty-one billion, six hundred fifty-five million, one hundred fifty-seven thousand, thirteen".