257061536 has 12 divisors (see below), whose sum is σ = 506089962. Its totient is φ = 128530752.

The previous prime is 257061479. The next prime is 257061559. The reversal of 257061536 is 635160752.

It can be written as a sum of positive squares in only one way, i.e., 171610000 + 85451536 = 13100^2 + 9244^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 257061496 and 257061505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4016555 + ... + 4016618.

Almost surely, 2^257061536 is an apocalyptic number.

It is an amenable number.

257061536 is a deficient number, since it is larger than the sum of its proper divisors (249028426).

257061536 is an equidigital number, since it uses as much as digits as its factorization.

257061536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8033183 (or 8033175 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 257061536 is about 16033.1386821171. The cubic root of 257061536 is about 635.8368580673.

The spelling of 257061536 in words is "two hundred fifty-seven million, sixty-one thousand, five hundred thirty-six".