1312360313661 has 16 divisors (see below), whose sum is σ = 1968240437120. Its totient is φ = 874906874316.

The previous prime is 1312360313659. The next prime is 1312360313689. The reversal of 1312360313661 is 1663130632131.

1312360313661 is a `hidden beast` number, since 1 + 3 + 12 + 3 + 603 + 1 + 36 + 6 + 1 = 666.

It is not a de Polignac number, because 1312360313661 - 2¹ = 1312360313659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312360313461) 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, 300034465 + ... + 300038838.

It is an arithmetic number, because the mean of its divisors is an integer number (123015027320).

Almost surely, 2^{1312360313661} is an apocalyptic number.

It is an amenable number.

1312360313661 is a deficient number, since it is larger than the sum of its proper divisors (655880123459).

1312360313661 is an frugal number, since it uses more digits than its factorization.

1312360313661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600073324 (or 600073306 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

Adding to 1312360313661 its reverse (1663130632131), we get a palindrome (2975490945792).

The spelling of 1312360313661 in words is "one trillion, three hundred twelve billion, three hundred sixty million, three hundred thirteen thousand, six hundred sixty-one".