56874618257 has 8 divisors (see below), whose sum is σ = 58855717800. Its totient is φ = 54894845824.

The previous prime is 56874618217. The next prime is 56874618289. The reversal of 56874618257 is 75281647865.

It is a Cunningham number, because it is equal to 238484²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 56874618256 = 1^2 + 238484^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 56874618257 - 2⁸ = 56874618001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56874618196 and 56874618205.

It is not an unprimeable number, because it can be changed into a prime (56874618217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244178 + ... + 416379.

It is an arithmetic number, because the mean of its divisors is an integer number (7356964725).

Almost surely, 2^56874618257 is an apocalyptic number.

It is an amenable number.

56874618257 is a deficient number, since it is larger than the sum of its proper divisors (1981099543).

56874618257 is a wasteful number, since it uses less digits than its factorization.

56874618257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663555.

The product of its digits is 22579200, while the sum is 59.

The spelling of 56874618257 in words is "fifty-six billion, eight hundred seventy-four million, six hundred eighteen thousand, two hundred fifty-seven".