657680225809 has 8 divisors (see below), whose sum is σ = 662993052480. Its totient is φ = 652371829200.

The previous prime is 657680225801. The next prime is 657680225893. The reversal of 657680225809 is 908522086756.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 657680225809 - 2³ = 657680225801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (657680225801) 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 7 ways as a sum of consecutive naturals, for example, 809077 + ... + 1403554.

It is an arithmetic number, because the mean of its divisors is an integer number (82874131560).

Almost surely, 2^657680225809 is an apocalyptic number.

It is an amenable number.

657680225809 is a deficient number, since it is larger than the sum of its proper divisors (5312826671).

657680225809 is a wasteful number, since it uses less digits than its factorization.

657680225809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215031.

The product of its (nonzero) digits is 14515200, while the sum is 58.

The spelling of 657680225809 in words is "six hundred fifty-seven billion, six hundred eighty million, two hundred twenty-five thousand, eight hundred nine".