56166111055650 has 24 divisors (see below), whose sum is σ = 139291955418384. Its totient is φ = 14977629614800.

The previous prime is 56166111055631. The next prime is 56166111055657. The reversal of 56166111055650 is 5655011166165.

It is a super-2 number, since 2×56166111055650² (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 56166111055650.

It is not an unprimeable number, because it can be changed into a prime (56166111055657) 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 11 ways as a sum of consecutive naturals, for example, 187220370036 + ... + 187220370335.

It is an arithmetic number, because the mean of its divisors is an integer number (5803831475766).

Almost surely, 2^{56166111055650} is an apocalyptic number.

56166111055650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

56166111055650 is an abundant number, since it is smaller than the sum of its proper divisors (83125844362734).

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

56166111055650 is a wasteful number, since it uses less digits than its factorization.

56166111055650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374440740386 (or 374440740381 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 48.

The spelling of 56166111055650 in words is "fifty-six trillion, one hundred sixty-six billion, one hundred eleven million, fifty-five thousand, six hundred fifty".