1312064623657 has 4 divisors (see below), whose sum is σ = 1312066916100. Its totient is φ = 1312062331216.

The previous prime is 1312064623651. The next prime is 1312064623663. The reversal of 1312064623657 is 7563264602131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (1312064623651) and next prime (1312064623663).

It can be written as a sum of positive squares in 2 ways, for example, as 844333103376 + 467731520281 = 918876^2 + 683909^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312064623657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312064623651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510219 + ... + 1698367.

It is an arithmetic number, because the mean of its divisors is an integer number (328016729025).

Almost surely, 2^{1312064623657} is an apocalyptic number.

It is an amenable number.

1312064623657 is a deficient number, since it is larger than the sum of its proper divisors (2292443).

1312064623657 is a wasteful number, since it uses less digits than its factorization.

1312064623657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292442.

The product of its (nonzero) digits is 1088640, while the sum is 46.

The spelling of 1312064623657 in words is "one trillion, three hundred twelve billion, sixty-four million, six hundred twenty-three thousand, six hundred fifty-seven".