275210392121261 has 2 divisors, whose sum is σ = 275210392121262. Its totient is φ = 275210392121260.

The previous prime is 275210392121251. The next prime is 275210392121299. The reversal of 275210392121261 is 162121293012572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267771168601225 + 7439223520036 = 16363715^2 + 2727494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-275210392121261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275210392121251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137605196060630 + 137605196060631.

It is an arithmetic number, because the mean of its divisors is an integer number (137605196060631).

Almost surely, 2^{275210392121261} is an apocalyptic number.

It is an amenable number.

275210392121261 is a deficient number, since it is larger than the sum of its proper divisors (1).

275210392121261 is an equidigital number, since it uses as much as digits as its factorization.

275210392121261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 275210392121261 in words is "two hundred seventy-five trillion, two hundred ten billion, three hundred ninety-two million, one hundred twenty-one thousand, two hundred sixty-one".