12915415135961 has 24 divisors (see below), whose sum is σ = 14250275329536. Its totient is φ = 11696101435200.

The previous prime is 12915415135939. The next prime is 12915415135993. The reversal of 12915415135961 is 16953151451921.

It is not a de Polignac number, because 12915415135961 - 2¹⁸ = 12915414873817 is a prime.

It is a super-2 number, since 2×12915415135961² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12915412135961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139243946 + ... + 139336668.

It is an arithmetic number, because the mean of its divisors is an integer number (593761472064).

Almost surely, 2^{12915415135961} is an apocalyptic number.

It is an amenable number.

12915415135961 is a deficient number, since it is larger than the sum of its proper divisors (1334860193575).

12915415135961 is a wasteful number, since it uses less digits than its factorization.

12915415135961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108353 (or 108340 counting only the distinct ones).

The product of its digits is 1458000, while the sum is 53.

The spelling of 12915415135961 in words is "twelve trillion, nine hundred fifteen billion, four hundred fifteen million, one hundred thirty-five thousand, nine hundred sixty-one".