657245361 has 4 divisors (see below), whose sum is σ = 876327152. Its totient is φ = 438163572.

The previous prime is 657245339. The next prime is 657245363. The reversal of 657245361 is 163542756.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 657245361 - 2¹⁰ = 657244337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (657245363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109540891 + ... + 109540896.

It is an arithmetic number, because the mean of its divisors is an integer number (219081788).

Almost surely, 2^657245361 is an apocalyptic number.

It is an amenable number.

657245361 is a deficient number, since it is larger than the sum of its proper divisors (219081791).

657245361 is a wasteful number, since it uses less digits than its factorization.

657245361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219081790.

The product of its digits is 151200, while the sum is 39.

The square root of 657245361 is about 25636.7970113273. The cubic root of 657245361 is about 869.4457918340.

The spelling of 657245361 in words is "six hundred fifty-seven million, two hundred forty-five thousand, three hundred sixty-one".