275657057209 has 2 divisors, whose sum is σ = 275657057210. Its totient is φ = 275657057208.

The previous prime is 275657057201. The next prime is 275657057233. The reversal of 275657057209 is 902750756572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171797815225 + 103859241984 = 414485^2 + 322272^2 .

It is a cyclic number.

It is not a de Polignac number, because 275657057209 - 2³ = 275657057201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 275657057209.

It is not a weakly prime, because it can be changed into another prime (275657057201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137828528604 + 137828528605.

It is an arithmetic number, because the mean of its divisors is an integer number (137828528605).

Almost surely, 2^275657057209 is an apocalyptic number.

It is an amenable number.

275657057209 is a deficient number, since it is larger than the sum of its proper divisors (1).

275657057209 is an equidigital number, since it uses as much as digits as its factorization.

275657057209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9261000, while the sum is 55.

The spelling of 275657057209 in words is "two hundred seventy-five billion, six hundred fifty-seven million, fifty-seven thousand, two hundred nine".