12961048513 has 16 divisors (see below), whose sum is σ = 15139587456. Its totient is φ = 10866902400.

The previous prime is 12961048501. The next prime is 12961048567. The reversal of 12961048513 is 31584016921.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12961048513 is a prime.

It is a super-2 number, since 2×12961048513² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12961048313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51756 + ... + 169117.

It is an arithmetic number, because the mean of its divisors is an integer number (946224216).

Almost surely, 2^12961048513 is an apocalyptic number.

It is an amenable number.

12961048513 is a deficient number, since it is larger than the sum of its proper divisors (2178538943).

12961048513 is a wasteful number, since it uses less digits than its factorization.

12961048513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221064.

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 12961048513 in words is "twelve billion, nine hundred sixty-one million, forty-eight thousand, five hundred thirteen".