445495257 has 24 divisors (see below), whose sum is σ = 672594624. Its totient is φ = 283608864.

The previous prime is 445495247. The next prime is 445495273. The reversal of 445495257 is 752594544.

445495257 is a `hidden beast` number, since 4 + 4 + 549 + 52 + 57 = 666.

It is not a de Polignac number, because 445495257 - 2¹² = 445491161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (445495247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 155278 + ... + 158120.

It is an arithmetic number, because the mean of its divisors is an integer number (28024776).

Almost surely, 2^445495257 is an apocalyptic number.

It is an amenable number.

445495257 is a deficient number, since it is larger than the sum of its proper divisors (227099367).

445495257 is a wasteful number, since it uses less digits than its factorization.

445495257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629 (or 3626 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The square root of 445495257 is about 21106.7585621289. The cubic root of 445495257 is about 763.7437950392.

The spelling of 445495257 in words is "four hundred forty-five million, four hundred ninety-five thousand, two hundred fifty-seven".