56661488416602 has 12 divisors (see below), whose sum is σ = 122766558236010. Its totient is φ = 18887162805528.

The previous prime is 56661488416583. The next prime is 56661488416607. The reversal of 56661488416602 is 20661488416665.

It can be written as a sum of positive squares in only one way, i.e., 31119896547441 + 25541591869161 = 5578521^2 + 5053869^2 .

It is a super-2 number, since 2×56661488416602² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56661488416602.

It is not an unprimeable number, because it can be changed into a prime (56661488416607) 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, 1573930233777 + ... + 1573930233812.

Almost surely, 2^{56661488416602} is an apocalyptic number.

56661488416602 is an abundant number, since it is smaller than the sum of its proper divisors (66105069819408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56661488416602 is a wasteful number, since it uses less digits than its factorization.

56661488416602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3147860467597 (or 3147860467594 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 63.

Adding to 56661488416602 its sum of digits (63), we get a palindrome (56661488416665).

The spelling of 56661488416602 in words is "fifty-six trillion, six hundred sixty-one billion, four hundred eighty-eight million, four hundred sixteen thousand, six hundred two".