11960137521 has 6 divisors (see below), whose sum is σ = 17275754210. Its totient is φ = 7973425008.

The previous prime is 11960137513. The next prime is 11960137531. The reversal of 11960137521 is 12573106911.

It is a happy number.

11960137521 is a `hidden beast` number, since 1 + 19 + 601 + 37 + 5 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11158964496 + 801173025 = 105636^2 + 28305^2 .

It is not a de Polignac number, because 11960137521 - 2³ = 11960137513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11960137531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 664452076 + ... + 664452093.

Almost surely, 2^11960137521 is an apocalyptic number.

It is an amenable number.

11960137521 is a deficient number, since it is larger than the sum of its proper divisors (5315616689).

11960137521 is a wasteful number, since it uses less digits than its factorization.

11960137521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328904175 (or 1328904172 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The spelling of 11960137521 in words is "eleven billion, nine hundred sixty million, one hundred thirty-seven thousand, five hundred twenty-one".