1255401313361 has 8 divisors (see below), whose sum is σ = 1351986416424. Its totient is φ = 1158818463360.

The previous prime is 1255401313333. The next prime is 1255401313363. The reversal of 1255401313361 is 1633131045521.

It can be written as a sum of positive squares in 4 ways, for example, as 158857247761 + 1096544065600 = 398569^2 + 1047160^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1255401313361 - 2³⁸ = 980523406417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255401313363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 698735 + ... + 1731771.

It is an arithmetic number, because the mean of its divisors is an integer number (168998302053).

Almost surely, 2^{1255401313361} is an apocalyptic number.

It is an amenable number.

1255401313361 is a deficient number, since it is larger than the sum of its proper divisors (96585103063).

1255401313361 is a wasteful number, since it uses less digits than its factorization.

1255401313361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126531.

The product of its (nonzero) digits is 32400, while the sum is 35.

Adding to 1255401313361 its reverse (1633131045521), we get a palindrome (2888532358882).

The spelling of 1255401313361 in words is "one trillion, two hundred fifty-five billion, four hundred one million, three hundred thirteen thousand, three hundred sixty-one".