56554706217 has 4 divisors (see below), whose sum is σ = 75406274960. Its totient is φ = 37703137476.

The previous prime is 56554706209. The next prime is 56554706269. The reversal of 56554706217 is 71260745565.

56554706217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 56554706217 - 2³ = 56554706209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56554706297) 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, 9425784367 + ... + 9425784372.

It is an arithmetic number, because the mean of its divisors is an integer number (18851568740).

Almost surely, 2^56554706217 is an apocalyptic number.

It is an amenable number.

56554706217 is a deficient number, since it is larger than the sum of its proper divisors (18851568743).

56554706217 is a wasteful number, since it uses less digits than its factorization.

56554706217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18851568742.

The product of its (nonzero) digits is 1764000, while the sum is 48.

The spelling of 56554706217 in words is "fifty-six billion, five hundred fifty-four million, seven hundred six thousand, two hundred seventeen".