1311631261616 has 40 divisors (see below), whose sum is σ = 2742757827264. Its totient is φ = 604043573760.

The previous prime is 1311631261613. The next prime is 1311631261693. The reversal of 1311631261616 is 6161621361131.

It is a self number, because there is not a number n which added to its sum of digits gives 1311631261616.

It is not an unprimeable number, because it can be changed into a prime (1311631261613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6804200 + ... + 6994311.

Almost surely, 2^{1311631261616} is an apocalyptic number.

1311631261616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1311631261616 is an abundant number, since it is smaller than the sum of its proper divisors (1431126565648).

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

1311631261616 is a wasteful number, since it uses less digits than its factorization.

1311631261616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13798989 (or 13798983 counting only the distinct ones).

The product of its digits is 23328, while the sum is 38.

The spelling of 1311631261616 in words is "one trillion, three hundred eleven billion, six hundred thirty-one million, two hundred sixty-one thousand, six hundred sixteen".