56878287865 has 24 divisors (see below), whose sum is σ = 80183594952. Its totient is φ = 38616076800.

The previous prime is 56878287847. The next prime is 56878287871.

56878287865 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 12813560809 + 44064727056 = 113197^2 + 209916^2 .

It is not a de Polignac number, because 56878287865 - 2¹¹ = 56878285817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56878287794 and 56878287803.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1124544 + ... + 1174033.

It is an arithmetic number, because the mean of its divisors is an integer number (3340983123).

Almost surely, 2^56878287865 is an apocalyptic number.

It is an amenable number.

56878287865 is a deficient number, since it is larger than the sum of its proper divisors (23305307087).

56878287865 is a wasteful number, since it uses less digits than its factorization.

56878287865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298697 (or 2298690 counting only the distinct ones).

The product of its digits is 361267200, while the sum is 70.

The spelling of 56878287865 in words is "fifty-six billion, eight hundred seventy-eight million, two hundred eighty-seven thousand, eight hundred sixty-five".