12137775517 has 4 divisors (see below), whose sum is σ = 13871743456. Its totient is φ = 10403807580.

The previous prime is 12137775499. The next prime is 12137775523. The reversal of 12137775517 is 71557773121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71557773121 = 23 ⋅3111207527.

It is a cyclic number.

It is not a de Polignac number, because 12137775517 - 2¹¹ = 12137773469 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 (12137775317) 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, 866983959 + ... + 866983972.

It is an arithmetic number, because the mean of its divisors is an integer number (3467935864).

Almost surely, 2^12137775517 is an apocalyptic number.

It is an amenable number.

12137775517 is a deficient number, since it is larger than the sum of its proper divisors (1733967939).

12137775517 is an equidigital number, since it uses as much as digits as its factorization.

12137775517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733967938.

The product of its digits is 360150, while the sum is 46.

The spelling of 12137775517 in words is "twelve billion, one hundred thirty-seven million, seven hundred seventy-five thousand, five hundred seventeen".