257552781076 has 6 divisors (see below), whose sum is σ = 450717366890. Its totient is φ = 128776390536.

The previous prime is 257552781067. The next prime is 257552781077. The reversal of 257552781076 is 670187255752.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 183064179600 + 74488601476 = 427860^2 + 272926^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257552781077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32194097631 + ... + 32194097638.

Almost surely, 2^257552781076 is an apocalyptic number.

It is an amenable number.

257552781076 is a deficient number, since it is larger than the sum of its proper divisors (193164585814).

257552781076 is a wasteful number, since it uses less digits than its factorization.

257552781076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64388195273 (or 64388195271 counting only the distinct ones).

The product of its (nonzero) digits is 8232000, while the sum is 55.

The spelling of 257552781076 in words is "two hundred fifty-seven billion, five hundred fifty-two million, seven hundred eighty-one thousand, seventy-six".