1312681668 has 24 divisors (see below), whose sum is σ = 3196095168. Its totient is φ = 418536096.

The previous prime is 1312681649. The next prime is 1312681703. The reversal of 1312681668 is 8661862131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2377771 + ... + 2378322.

It is an arithmetic number, because the mean of its divisors is an integer number (133170632).

Almost surely, 2^1312681668 is an apocalyptic number.

It is an amenable number.

1312681668 is an abundant number, since it is smaller than the sum of its proper divisors (1883413500).

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

1312681668 is a wasteful number, since it uses less digits than its factorization.

1312681668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4756123 (or 4756121 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 1312681668 is about 36230.9490353206. The cubic root of 1312681668 is about 1094.9302981007.

The spelling of 1312681668 in words is "one billion, three hundred twelve million, six hundred eighty-one thousand, six hundred sixty-eight".