12779544897 has 24 divisors (see below), whose sum is σ = 21610942080. Its totient is φ = 7124483520.

The previous prime is 12779544887. The next prime is 12779544931. The reversal of 12779544897 is 79844597721.

12779544897 is a `hidden beast` number, since 1 + 2 + 7 + 7 + 9 + 544 + 89 + 7 = 666.

It is not a de Polignac number, because 12779544897 - 2⁴ = 12779544881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (12779544887) 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, 2471197 + ... + 2476362.

It is an arithmetic number, because the mean of its divisors is an integer number (900455920).

Almost surely, 2^12779544897 is an apocalyptic number.

It is an amenable number.

12779544897 is a deficient number, since it is larger than the sum of its proper divisors (8831397183).

12779544897 is a wasteful number, since it uses less digits than its factorization.

12779544897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4947613 (or 4947610 counting only the distinct ones).

The product of its digits is 35562240, while the sum is 63.

The spelling of 12779544897 in words is "twelve billion, seven hundred seventy-nine million, five hundred forty-four thousand, eight hundred ninety-seven".