12956438677 has 16 divisors (see below), whose sum is σ = 15953656320. Its totient is φ = 10246574592.

The previous prime is 12956438647. The next prime is 12956438717. The reversal of 12956438677 is 77683465921.

It is a cyclic number.

It is not a de Polignac number, because 12956438677 - 2¹¹ = 12956436629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12956438647) 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, 175524 + ... + 238162.

It is an arithmetic number, because the mean of its divisors is an integer number (997103520).

Almost surely, 2^12956438677 is an apocalyptic number.

It is an amenable number.

12956438677 is a deficient number, since it is larger than the sum of its proper divisors (2997217643).

12956438677 is a wasteful number, since it uses less digits than its factorization.

12956438677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64932.

The product of its digits is 15240960, while the sum is 58.

The spelling of 12956438677 in words is "twelve billion, nine hundred fifty-six million, four hundred thirty-eight thousand, six hundred seventy-seven".