1312856722365 has 16 divisors (see below), whose sum is σ = 2100592061568. Its totient is φ = 700183150016.

The previous prime is 1312856722361. The next prime is 1312856722367. The reversal of 1312856722365 is 5632276582131.

It is a cyclic number.

It is not a de Polignac number, because 1312856722365 - 2² = 1312856722361 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312856722361) 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, 1307119 + ... + 2081891.

It is an arithmetic number, because the mean of its divisors is an integer number (131287003848).

Almost surely, 2^{1312856722365} is an apocalyptic number.

1312856722365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312856722365 is a deficient number, since it is larger than the sum of its proper divisors (787735339203).

1312856722365 is a wasteful number, since it uses less digits than its factorization.

1312856722365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887748.

The product of its digits is 3628800, while the sum is 51.

The spelling of 1312856722365 in words is "one trillion, three hundred twelve billion, eight hundred fifty-six million, seven hundred twenty-two thousand, three hundred sixty-five".