11517413137 has 4 divisors (see below), whose sum is σ = 11519397556. Its totient is φ = 11515428720.

The previous prime is 11517413101. The next prime is 11517413161. The reversal of 11517413137 is 73131471511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73131471511 = 7 ⋅10447353073.

It can be written as a sum of positive squares in 2 ways, for example, as 4203058561 + 7314354576 = 64831^2 + 85524^2 .

It is a cyclic number.

It is not a de Polignac number, because 11517413137 - 2¹⁹ = 11516888849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11515413137) 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 3 ways as a sum of consecutive naturals, for example, 983478 + ... + 995119.

It is an arithmetic number, because the mean of its divisors is an integer number (2879849389).

Almost surely, 2^11517413137 is an apocalyptic number.

It is an amenable number.

11517413137 is a deficient number, since it is larger than the sum of its proper divisors (1984419).

11517413137 is an equidigital number, since it uses as much as digits as its factorization.

11517413137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984418.

The product of its digits is 8820, while the sum is 34.

Adding to 11517413137 its reverse (73131471511), we get a palindrome (84648884648).

The spelling of 11517413137 in words is "eleven billion, five hundred seventeen million, four hundred thirteen thousand, one hundred thirty-seven".