12961115398 has 64 divisors (see below), whose sum is σ = 24988746240. Its totient is φ = 4895942400.

The previous prime is 12961115393. The next prime is 12961115423. The reversal of 12961115398 is 89351116921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12961115393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 653508 + ... + 673048.

It is an arithmetic number, because the mean of its divisors is an integer number (390449160).

Almost surely, 2^12961115398 is an apocalyptic number.

12961115398 is a deficient number, since it is larger than the sum of its proper divisors (12027630842).

12961115398 is a wasteful number, since it uses less digits than its factorization.

12961115398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19693.

The product of its digits is 116640, while the sum is 46.

The spelling of 12961115398 in words is "twelve billion, nine hundred sixty-one million, one hundred fifteen thousand, three hundred ninety-eight".