257649411 has 4 divisors (see below), whose sum is σ = 343532552. Its totient is φ = 171766272.

The previous prime is 257649397. The next prime is 257649449. The reversal of 257649411 is 114946752.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 257649411 - 2⁹ = 257648899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 257649411.

It is not an unprimeable number, because it can be changed into a prime (257649211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42941566 + ... + 42941571.

It is an arithmetic number, because the mean of its divisors is an integer number (85883138).

Almost surely, 2^257649411 is an apocalyptic number.

257649411 is a deficient number, since it is larger than the sum of its proper divisors (85883141).

257649411 is an equidigital number, since it uses as much as digits as its factorization.

257649411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85883140.

The product of its digits is 60480, while the sum is 39.

The square root of 257649411 is about 16051.4613353426. The cubic root of 257649411 is about 636.3211882886.

The spelling of 257649411 in words is "two hundred fifty-seven million, six hundred forty-nine thousand, four hundred eleven".