257364454 has 4 divisors (see below), whose sum is σ = 386046684. Its totient is φ = 128682226.

The previous prime is 257364413. The next prime is 257364467. The reversal of 257364454 is 454463752.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64341112 + ... + 64341115.

It is an arithmetic number, because the mean of its divisors is an integer number (96511671).

Almost surely, 2^257364454 is an apocalyptic number.

257364454 is a deficient number, since it is larger than the sum of its proper divisors (128682230).

257364454 is a wasteful number, since it uses less digits than its factorization.

257364454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128682229.

The product of its digits is 403200, while the sum is 40.

The square root of 257364454 is about 16042.5825227736. The cubic root of 257364454 is about 636.0865140146.

The spelling of 257364454 in words is "two hundred fifty-seven million, three hundred sixty-four thousand, four hundred fifty-four".