56172283889 has 4 divisors (see below), whose sum is σ = 57232138356. Its totient is φ = 55112429424.

The previous prime is 56172283859. The next prime is 56172283897. The reversal of 56172283889 is 98838227165.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45468312289 + 10703971600 = 213233^2 + 103460^2 .

It is a cyclic number.

It is not a de Polignac number, because 56172283889 - 2⁸ = 56172283633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56172283819) 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, 529927154 + ... + 529927259.

It is an arithmetic number, because the mean of its divisors is an integer number (14308034589).

Almost surely, 2^56172283889 is an apocalyptic number.

It is an amenable number.

56172283889 is a deficient number, since it is larger than the sum of its proper divisors (1059854467).

56172283889 is a wasteful number, since it uses less digits than its factorization.

56172283889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059854466.

The product of its digits is 11612160, while the sum is 59.

The spelling of 56172283889 in words is "fifty-six billion, one hundred seventy-two million, two hundred eighty-three thousand, eight hundred eighty-nine".