13137120745 has 12 divisors (see below), whose sum is σ = 18338348484. Its totient is φ = 9008311200.

The previous prime is 13137120713. The next prime is 13137120757. The reversal of 13137120745 is 54702173131.

It can be written as a sum of positive squares in 2 ways, for example, as 4967853289 + 8169267456 = 70483^2 + 90384^2 .

It is not a de Polignac number, because 13137120745 - 2⁵ = 13137120713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13137120745.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26810206 + ... + 26810695.

It is an arithmetic number, because the mean of its divisors is an integer number (1528195707).

Almost surely, 2^13137120745 is an apocalyptic number.

It is an amenable number.

13137120745 is a deficient number, since it is larger than the sum of its proper divisors (5201227739).

13137120745 is an equidigital number, since it uses as much as digits as its factorization.

13137120745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53620920 (or 53620913 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

Adding to 13137120745 its reverse (54702173131), we get a palindrome (67839293876).

The spelling of 13137120745 in words is "thirteen billion, one hundred thirty-seven million, one hundred twenty thousand, seven hundred forty-five".