11537525117 has 4 divisors (see below), whose sum is σ = 11540086140. Its totient is φ = 11534964096.

The previous prime is 11537525113. The next prime is 11537525119. The reversal of 11537525117 is 71152573511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71152573511 = 53 ⋅1342501387.

It can be written as a sum of positive squares in 2 ways, for example, as 172685881 + 11364839236 = 13141^2 + 106606^2 .

It is a cyclic number.

It is not a de Polignac number, because 11537525117 - 2² = 11537525113 is a prime.

It is a super-2 number, since 2×11537525117² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11537525113) 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, 1273742 + ... + 1282767.

It is an arithmetic number, because the mean of its divisors is an integer number (2885021535).

Almost surely, 2^11537525117 is an apocalyptic number.

It is an amenable number.

11537525117 is a deficient number, since it is larger than the sum of its proper divisors (2561023).

11537525117 is an equidigital number, since it uses as much as digits as its factorization.

11537525117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561022.

The product of its digits is 36750, while the sum is 38.

The spelling of 11537525117 in words is "eleven billion, five hundred thirty-seven million, five hundred twenty-five thousand, one hundred seventeen".