56673389449 has 4 divisors (see below), whose sum is σ = 59656199440. Its totient is φ = 53690579460.

The previous prime is 56673389441. The next prime is 56673389489. The reversal of 56673389449 is 94498337665.

56673389449 = 22240² + 22241² + ... + 22353².

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 a cyclic number.

It is not a de Polignac number, because 56673389449 - 2³ = 56673389441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56673389441) 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, 1491404967 + ... + 1491405004.

It is an arithmetic number, because the mean of its divisors is an integer number (14914049860).

Almost surely, 2^56673389449 is an apocalyptic number.

It is an amenable number.

56673389449 is a deficient number, since it is larger than the sum of its proper divisors (2982809991).

56673389449 is a wasteful number, since it uses less digits than its factorization.

56673389449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982809990.

The product of its digits is 117573120, while the sum is 64.

The spelling of 56673389449 in words is "fifty-six billion, six hundred seventy-three million, three hundred eighty-nine thousand, four hundred forty-nine".