56660487819 has 16 divisors (see below), whose sum is σ = 81713940000. Its totient is φ = 34715725056.

The previous prime is 56660487817. The next prime is 56660487827. The reversal of 56660487819 is 91878406665.

It is not a de Polignac number, because 56660487819 - 2¹ = 56660487817 is a prime.

It is a super-2 number, since 2×56660487819² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56660487817) 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 15 ways as a sum of consecutive naturals, for example, 3163194 + ... + 3181055.

It is an arithmetic number, because the mean of its divisors is an integer number (5107121250).

Almost surely, 2^56660487819 is an apocalyptic number.

56660487819 is a deficient number, since it is larger than the sum of its proper divisors (25053452181).

56660487819 is a wasteful number, since it uses less digits than its factorization.

56660487819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6344494.

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 56660487819 in words is "fifty-six billion, six hundred sixty million, four hundred eighty-seven thousand, eight hundred nineteen".