657942464563 has 4 divisors (see below), whose sum is σ = 657945302040. Its totient is φ = 657939627088.

The previous prime is 657942464561. The next prime is 657942464567. The reversal of 657942464563 is 365464249756.

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

It is a cyclic number.

It is not a de Polignac number, because 657942464563 - 2¹ = 657942464561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (657942464561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1036618 + ... + 1546111.

It is an arithmetic number, because the mean of its divisors is an integer number (164486325510).

Almost surely, 2^657942464563 is an apocalyptic number.

657942464563 is a deficient number, since it is larger than the sum of its proper divisors (2837477).

657942464563 is a wasteful number, since it uses less digits than its factorization.

657942464563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837476.

The product of its digits is 130636800, while the sum is 61.

The spelling of 657942464563 in words is "six hundred fifty-seven billion, nine hundred forty-two million, four hundred sixty-four thousand, five hundred sixty-three".