12901778461679 has 16 divisors (see below), whose sum is σ = 13153307836800. Its totient is φ = 12652101833184.

The previous prime is 12901778461643. The next prime is 12901778461729. The reversal of 12901778461679 is 97616487710921.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12901778461679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12901778461879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13942877 + ... + 14839385.

It is an arithmetic number, because the mean of its divisors is an integer number (822081739800).

Almost surely, 2^{12901778461679} is an apocalyptic number.

12901778461679 is a deficient number, since it is larger than the sum of its proper divisors (251529375121).

12901778461679 is an equidigital number, since it uses as much as digits as its factorization.

12901778461679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897542.

The product of its (nonzero) digits is 64012032, while the sum is 68.

The spelling of 12901778461679 in words is "twelve trillion, nine hundred one billion, seven hundred seventy-eight million, four hundred sixty-one thousand, six hundred seventy-nine".