257775641 has 8 divisors (see below), whose sum is σ = 287304480. Its totient is φ = 229843008.

The previous prime is 257775613. The next prime is 257775659. The reversal of 257775641 is 146577752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257775641 - 2²² = 253581337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257775592 and 257775601.

It is not an unprimeable number, because it can be changed into a prime (257775611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398711 + ... + 399356.

It is an arithmetic number, because the mean of its divisors is an integer number (35913060).

Almost surely, 2^257775641 is an apocalyptic number.

It is an amenable number.

257775641 is a deficient number, since it is larger than the sum of its proper divisors (29528839).

257775641 is a wasteful number, since it uses less digits than its factorization.

257775641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798103.

The product of its digits is 411600, while the sum is 44.

The square root of 257775641 is about 16055.3928946009. The cubic root of 257775641 is about 636.4250887909.

The spelling of 257775641 in words is "two hundred fifty-seven million, seven hundred seventy-five thousand, six hundred forty-one".