457642557 has 12 divisors (see below), whose sum is σ = 671876764. Its totient is φ = 300093120.

The previous prime is 457642543. The next prime is 457642561. The reversal of 457642557 is 755246754.

457642557 is a `hidden beast` number, since 4 + 57 + 6 + 42 + 557 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 248724441 + 208918116 = 15771^2 + 14454^2 .

It is a de Polignac number, because none of the positive numbers 2^k-457642557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (457642517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 416248 + ... + 417345.

Almost surely, 2^457642557 is an apocalyptic number.

It is an amenable number.

457642557 is a deficient number, since it is larger than the sum of its proper divisors (214234207).

457642557 is a wasteful number, since it uses less digits than its factorization.

457642557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833660 (or 833657 counting only the distinct ones).

The product of its digits is 1176000, while the sum is 45.

The square root of 457642557 is about 21392.5818217437. The cubic root of 457642557 is about 770.6232975337.

The spelling of 457642557 in words is "four hundred fifty-seven million, six hundred forty-two thousand, five hundred fifty-seven".