56781343746 has 48 divisors (see below), whose sum is σ = 124294659840. Its totient is φ = 18732193920.

The previous prime is 56781343727. The next prime is 56781343747. The reversal of 56781343746 is 64734318765.

It is a happy number.

56781343746 is a `hidden beast` number, since 567 + 8 + 1 + 3 + 4 + 3 + 74 + 6 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56781343692 and 56781343701.

It is not an unprimeable number, because it can be changed into a prime (56781343747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3460650 + ... + 3477018.

It is an arithmetic number, because the mean of its divisors is an integer number (2589472080).

Almost surely, 2^56781343746 is an apocalyptic number.

56781343746 is an abundant number, since it is smaller than the sum of its proper divisors (67513316094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56781343746 is a wasteful number, since it uses less digits than its factorization.

56781343746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18351 (or 18348 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 54.

The spelling of 56781343746 in words is "fifty-six billion, seven hundred eighty-one million, three hundred forty-three thousand, seven hundred forty-six".