56028783617 has 4 divisors (see below), whose sum is σ = 59324594436. Its totient is φ = 52732972800.

The previous prime is 56028783571. The next prime is 56028783637. The reversal of 56028783617 is 71638782065.

It is a Cunningham number, because it is equal to 236704²+1.

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 43620828736 + 12407954881 = 208856^2 + 111391^2 .

It is a cyclic number.

It is not a de Polignac number, because 56028783617 - 2⁶ = 56028783553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56028783637) 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, 1647905384 + ... + 1647905417.

It is an arithmetic number, because the mean of its divisors is an integer number (14831148609).

Almost surely, 2^56028783617 is an apocalyptic number.

It is an amenable number.

56028783617 is a deficient number, since it is larger than the sum of its proper divisors (3295810819).

56028783617 is a wasteful number, since it uses less digits than its factorization.

56028783617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3295810818.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 56028783617 in words is "fifty-six billion, twenty-eight million, seven hundred eighty-three thousand, six hundred seventeen".