1311564604056 has 64 divisors (see below), whose sum is σ = 3747505198080. Its totient is φ = 374714968320.

The previous prime is 1311564604033. The next prime is 1311564604079. The reversal of 1311564604056 is 6504064651131.

It is an interprime number because it is at equal distance from previous prime (1311564604033) and next prime (1311564604079).

It is a super-2 number, since 2×1311564604056² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1311564603999 and 1311564604017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3596145 + ... + 3944031.

It is an arithmetic number, because the mean of its divisors is an integer number (58554768720).

Almost surely, 2^{1311564604056} is an apocalyptic number.

It is an amenable number.

1311564604056 is an abundant number, since it is smaller than the sum of its proper divisors (2435940594024).

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

1311564604056 is a wasteful number, since it uses less digits than its factorization.

1311564604056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370344 (or 370340 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 1311564604056 in words is "one trillion, three hundred eleven billion, five hundred sixty-four million, six hundred four thousand, fifty-six".