1317177638225 has 6 divisors (see below), whose sum is σ = 1633300271430. Its totient is φ = 1053742110560.

The previous prime is 1317177638213. The next prime is 1317177638233. The reversal of 1317177638225 is 5228367717131.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3604921681 + 1313572716544 = 60041^2 + 1146112^2 .

It is not a de Polignac number, because 1317177638225 - 2⁴ = 1317177638209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26343552740 + ... + 26343552789.

It is an arithmetic number, because the mean of its divisors is an integer number (272216711905).

Almost surely, 2^{1317177638225} is an apocalyptic number.

It is an amenable number.

1317177638225 is a deficient number, since it is larger than the sum of its proper divisors (316122633205).

1317177638225 is an equidigital number, since it uses as much as digits as its factorization.

1317177638225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52687105539 (or 52687105534 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 53.

The spelling of 1317177638225 in words is "one trillion, three hundred seventeen billion, one hundred seventy-seven million, six hundred thirty-eight thousand, two hundred twenty-five".