275995721257 has 2 divisors, whose sum is σ = 275995721258. Its totient is φ = 275995721256.

The previous prime is 275995721251. The next prime is 275995721329. The reversal of 275995721257 is 752127599572.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275725809216 + 269912041 = 525096^2 + 16429^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-275995721257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 275995721195 and 275995721204.

It is not a weakly prime, because it can be changed into another prime (275995721251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137997860628 + 137997860629.

It is an arithmetic number, because the mean of its divisors is an integer number (137997860629).

Almost surely, 2^275995721257 is an apocalyptic number.

It is an amenable number.

275995721257 is a deficient number, since it is larger than the sum of its proper divisors (1).

275995721257 is an equidigital number, since it uses as much as digits as its factorization.

275995721257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27783000, while the sum is 61.

The spelling of 275995721257 in words is "two hundred seventy-five billion, nine hundred ninety-five million, seven hundred twenty-one thousand, two hundred fifty-seven".