1312363949265 has 40 divisors (see below), whose sum is σ = 2433655774440. Its totient is φ = 675792004608.

The previous prime is 1312363949203. The next prime is 1312363949269. The reversal of 1312363949265 is 5629493632131.

1312363949265 is a `hidden beast` number, since 1 + 3 + 12 + 363 + 9 + 4 + 9 + 265 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 207323587584 + 1105040361681 = 455328^2 + 1051209^2 .

It is not a de Polignac number, because 1312363949265 - 2¹⁷ = 1312363818193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312363949269) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 55857304 + ... + 55880793.

It is an arithmetic number, because the mean of its divisors is an integer number (60841394361).

Almost surely, 2^{1312363949265} is an apocalyptic number.

1312363949265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312363949265 is a deficient number, since it is larger than the sum of its proper divisors (1121291825175).

1312363949265 is a wasteful number, since it uses less digits than its factorization.

1312363949265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111738143 (or 111738134 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 54.

The spelling of 1312363949265 in words is "one trillion, three hundred twelve billion, three hundred sixty-three million, nine hundred forty-nine thousand, two hundred sixty-five".