1313257012625 has 16 divisors (see below), whose sum is σ = 1640478075600. Its totient is φ = 1049622710400.

The previous prime is 1313257012621. The next prime is 1313257012657. The reversal of 1313257012625 is 5262107523131.

It can be written as a sum of positive squares in 8 ways, for example, as 219952558081 + 1093304454544 = 468991^2 + 1045612^2 .

It is not a de Polignac number, because 1313257012625 - 2² = 1313257012621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313257012621) 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, 4780340 + ... + 5047589.

It is an arithmetic number, because the mean of its divisors is an integer number (102529879725).

Almost surely, 2^{1313257012625} is an apocalyptic number.

It is an amenable number.

1313257012625 is a deficient number, since it is larger than the sum of its proper divisors (327221062975).

1313257012625 is an equidigital number, since it uses as much as digits as its factorization.

1313257012625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9829013 (or 9829003 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 1313257012625 in words is "one trillion, three hundred thirteen billion, two hundred fifty-seven million, twelve thousand, six hundred twenty-five".