657043648 has 14 divisors (see below), whose sum is σ = 1303821116. Its totient is φ = 328521792.

The previous prime is 657043637. The next prime is 657043649. The reversal of 657043648 is 846340756.

It is not an unprimeable number, because it can be changed into a prime (657043649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5133090 + ... + 5133217.

Almost surely, 2^657043648 is an apocalyptic number.

It is an amenable number.

657043648 is a deficient number, since it is larger than the sum of its proper divisors (646777468).

657043648 is a wasteful number, since it uses less digits than its factorization.

657043648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10266319 (or 10266309 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The square root of 657043648 is about 25632.8626571439. The cubic root of 657043648 is about 869.3568364889.

The spelling of 657043648 in words is "six hundred fifty-seven million, forty-three thousand, six hundred forty-eight".