257435055361 has 6 divisors (see below), whose sum is σ = 282965804786. Its totient is φ = 234031868400.

The previous prime is 257435055343. The next prime is 257435055413. The reversal of 257435055361 is 163550534752.

It can be written as a sum of positive squares in only one way, i.e., 254968443136 + 2466612225 = 504944^2 + 49665^2 .

It is not a de Polignac number, because 257435055361 - 2⁵ = 257435055329 is a prime.

It is a super-2 number, since 2×257435055361² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257435055961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1063781100 + ... + 1063781341.

Almost surely, 2^257435055361 is an apocalyptic number.

It is an amenable number.

257435055361 is a deficient number, since it is larger than the sum of its proper divisors (25530749425).

257435055361 is a wasteful number, since it uses less digits than its factorization.

257435055361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127562463 (or 2127562452 counting only the distinct ones).

The product of its (nonzero) digits is 1890000, while the sum is 46.

The spelling of 257435055361 in words is "two hundred fifty-seven billion, four hundred thirty-five million, fifty-five thousand, three hundred sixty-one".