1255361308261 has 16 divisors (see below), whose sum is σ = 1264470939648. Its totient is φ = 1246287798000.

The previous prime is 1255361308199. The next prime is 1255361308273. The reversal of 1255361308261 is 1628031635521.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255361308261 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 (1255361308291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127429986 + ... + 127439836.

It is an arithmetic number, because the mean of its divisors is an integer number (79029433728).

Almost surely, 2^{1255361308261} is an apocalyptic number.

It is an amenable number.

1255361308261 is a deficient number, since it is larger than the sum of its proper divisors (9109631387).

1255361308261 is an equidigital number, since it uses as much as digits as its factorization.

1255361308261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11592.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 1255361308261 in words is "one trillion, two hundred fifty-five billion, three hundred sixty-one million, three hundred eight thousand, two hundred sixty-one".