12761991896544 has 72 divisors (see below), whose sum is σ = 39591179416152. Its totient is φ = 3867270270720.

The previous prime is 12761991896453. The next prime is 12761991896597. The reversal of 12761991896544 is 44569819916721.

12761991896544 is a `hidden beast` number, since 1 + 2 + 7 + 61 + 9 + 9 + 18 + 9 + 6 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2014200099 + ... + 2014206434.

It is an arithmetic number, because the mean of its divisors is an integer number (549877491891).

Almost surely, 2^{12761991896544} is an apocalyptic number.

It is an amenable number.

12761991896544 is an abundant number, since it is smaller than the sum of its proper divisors (26829187519608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12761991896544 is a wasteful number, since it uses less digits than its factorization.

12761991896544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028406560 (or 4028406549 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 72.

The spelling of 12761991896544 in words is "twelve trillion, seven hundred sixty-one billion, nine hundred ninety-one million, eight hundred ninety-six thousand, five hundred forty-four".