1279464646128 has 20 divisors (see below), whose sum is σ = 3305283669288. Its totient is φ = 426488215360.

The previous prime is 1279464646121. The next prime is 1279464646129. The reversal of 1279464646128 is 8216464649721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279464646121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13327756683 + ... + 13327756778.

Almost surely, 2^{1279464646128} is an apocalyptic number.

It is an amenable number.

1279464646128 is an abundant number, since it is smaller than the sum of its proper divisors (2025819023160).

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

1279464646128 is a wasteful number, since it uses less digits than its factorization.

1279464646128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26655513472 (or 26655513466 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 60.

The spelling of 1279464646128 in words is "one trillion, two hundred seventy-nine billion, four hundred sixty-four million, six hundred forty-six thousand, one hundred twenty-eight".