56553966919 has 4 divisors (see below), whose sum is σ = 57869175496. Its totient is φ = 55238758344.

The previous prime is 56553966913. The next prime is 56553966947. The reversal of 56553966919 is 91966935565.

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 56553966919 - 2¹¹ = 56553964871 is a prime.

It is a super-2 number, since 2×56553966919² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56553966913) 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, 657604224 + ... + 657604309.

It is an arithmetic number, because the mean of its divisors is an integer number (14467293874).

Almost surely, 2^56553966919 is an apocalyptic number.

56553966919 is a deficient number, since it is larger than the sum of its proper divisors (1315208577).

56553966919 is a wasteful number, since it uses less digits than its factorization.

56553966919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315208576.

The product of its digits is 59049000, while the sum is 64.

The spelling of 56553966919 in words is "fifty-six billion, five hundred fifty-three million, nine hundred sixty-six thousand, nine hundred nineteen".