56626923821 has 8 divisors (see below), whose sum is σ = 60999495480. Its totient is φ = 52256731392.

The previous prime is 56626923811. The next prime is 56626923827. The reversal of 56626923821 is 12832962665.

It can be written as a sum of positive squares in 4 ways, for example, as 35271721 + 56591652100 = 5939^2 + 237890^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56626923821 is a prime.

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 56626923821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56626923827) 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 7 ways as a sum of consecutive naturals, for example, 545216 + ... + 640713.

It is an arithmetic number, because the mean of its divisors is an integer number (7624936935).

Almost surely, 2^56626923821 is an apocalyptic number.

It is an amenable number.

56626923821 is a deficient number, since it is larger than the sum of its proper divisors (4372571659).

56626923821 is a wasteful number, since it uses less digits than its factorization.

56626923821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189615.

The product of its digits is 1866240, while the sum is 50.

The spelling of 56626923821 in words is "fifty-six billion, six hundred twenty-six million, nine hundred twenty-three thousand, eight hundred twenty-one".