1268391304464 has 20 divisors (see below), whose sum is σ = 3276677536656. Its totient is φ = 422797101472.

The previous prime is 1268391304459. The next prime is 1268391304493. The reversal of 1268391304464 is 4644031938621.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13212409374 + ... + 13212409469.

Almost surely, 2^{1268391304464} is an apocalyptic number.

It is an amenable number.

1268391304464 is an abundant number, since it is smaller than the sum of its proper divisors (2008286232192).

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

1268391304464 is a wasteful number, since it uses less digits than its factorization.

1268391304464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26424818854 (or 26424818848 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 51.

The spelling of 1268391304464 in words is "one trillion, two hundred sixty-eight billion, three hundred ninety-one million, three hundred four thousand, four hundred sixty-four".