56784455057 has 6 divisors (see below), whose sum is σ = 62415971394. Its totient is φ = 51622231760.

The previous prime is 56784455033. The next prime is 56784455083. The reversal of 56784455057 is 75055448765.

It can be written as a sum of positive squares in only one way, i.e., 51467274496 + 5317180561 = 226864^2 + 72919^2 .

It is not a de Polignac number, because 56784455057 - 2¹⁶ = 56784389521 is a prime.

It is a super-2 number, since 2×56784455057² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56784454993 and 56784455011.

It is not an unprimeable number, because it can be changed into a prime (56784455017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 234646388 + ... + 234646629.

It is an arithmetic number, because the mean of its divisors is an integer number (10402661899).

Almost surely, 2^56784455057 is an apocalyptic number.

It is an amenable number.

56784455057 is a deficient number, since it is larger than the sum of its proper divisors (5631516337).

56784455057 is a wasteful number, since it uses less digits than its factorization.

56784455057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469293039 (or 469293028 counting only the distinct ones).

The product of its (nonzero) digits is 23520000, while the sum is 56.

The spelling of 56784455057 in words is "fifty-six billion, seven hundred eighty-four million, four hundred fifty-five thousand, fifty-seven".