56226317781 has 4 divisors (see below), whose sum is σ = 74968423712. Its totient is φ = 37484211852.

The previous prime is 56226317767. The next prime is 56226317809. The reversal of 56226317781 is 18771362265.

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 56226317781 - 2⁶ = 56226317717 is a prime.

It is a super-2 number, since 2×56226317781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56226317781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56226317711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9371052961 + ... + 9371052966.

It is an arithmetic number, because the mean of its divisors is an integer number (18742105928).

Almost surely, 2^56226317781 is an apocalyptic number.

It is an amenable number.

56226317781 is a deficient number, since it is larger than the sum of its proper divisors (18742105931).

56226317781 is a wasteful number, since it uses less digits than its factorization.

56226317781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18742105930.

The product of its digits is 846720, while the sum is 48.

The spelling of 56226317781 in words is "fifty-six billion, two hundred twenty-six million, three hundred seventeen thousand, seven hundred eighty-one".