13280515137 has 10 divisors (see below), whose sum is σ = 19838794338. Its totient is φ = 8853676704.

The previous prime is 13280515133. The next prime is 13280515147. The reversal of 13280515137 is 73151508231.

It is a happy number.

13280515137 is a `hidden beast` number, since 1 + 3 + 2 + 8 + 0 + 515 + 137 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7892367921 + 5388147216 = 88839^2 + 73404^2 .

It is not a de Polignac number, because 13280515137 - 2² = 13280515133 is a prime.

It is a super-2 number, since 2×13280515137² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13280515133) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 81978408 + ... + 81978569.

Almost surely, 2^13280515137 is an apocalyptic number.

It is an amenable number.

13280515137 is a deficient number, since it is larger than the sum of its proper divisors (6558279201).

13280515137 is an equidigital number, since it uses as much as digits as its factorization.

13280515137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163956989 (or 163956980 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 13280515137 in words is "thirteen billion, two hundred eighty million, five hundred fifteen thousand, one hundred thirty-seven".