12961193536863 has 40 divisors (see below), whose sum is σ = 22746710045136. Its totient is φ = 7251017356800.

The previous prime is 12961193536849. The next prime is 12961193536873. The reversal of 12961193536863 is 36863539116921.

12961193536863 is a `hidden beast` number, since 1 + 2 + 9 + 6 + 1 + 1 + 93 + 536 + 8 + 6 + 3 = 666.

It is not a de Polignac number, because 12961193536863 - 2⁶ = 12961193536799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12961193536863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12961193536813) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 559480498 + ... + 559503663.

Almost surely, 2^{12961193536863} is an apocalyptic number.

12961193536863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12961193536863 is a deficient number, since it is larger than the sum of its proper divisors (9785516508273).

12961193536863 is a wasteful number, since it uses less digits than its factorization.

12961193536863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118984197 (or 1118984188 counting only the distinct ones).

The product of its digits is 37791360, while the sum is 63.

The spelling of 12961193536863 in words is "twelve trillion, nine hundred sixty-one billion, one hundred ninety-three million, five hundred thirty-six thousand, eight hundred sixty-three".