257577916 has 6 divisors (see below), whose sum is σ = 450761360. Its totient is φ = 128788956.

The previous prime is 257577877. The next prime is 257577917. The reversal of 257577916 is 619775752.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 257577916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257577917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32197236 + ... + 32197243.

Almost surely, 2^257577916 is an apocalyptic number.

It is an amenable number.

257577916 is a deficient number, since it is larger than the sum of its proper divisors (193183444).

257577916 is a wasteful number, since it uses less digits than its factorization.

257577916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64394483 (or 64394481 counting only the distinct ones).

The product of its digits is 926100, while the sum is 49.

The square root of 257577916 is about 16049.2341250291. The cubic root of 257577916 is about 636.2623253660.

The spelling of 257577916 in words is "two hundred fifty-seven million, five hundred seventy-seven thousand, nine hundred sixteen".