556649450861 has 16 divisors (see below), whose sum is σ = 687752223360. Its totient is φ = 439799440320.

The previous prime is 556649450849. The next prime is 556649450867. The reversal of 556649450861 is 168054946655.

It is a de Polignac number, because none of the positive numbers 2^k-556649450861 is a prime.

It is a super-3 number, since 3×556649450861³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 556649450861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556649450867) 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, 56553650 + ... + 56563491.

It is an arithmetic number, because the mean of its divisors is an integer number (42984513960).

Almost surely, 2^556649450861 is an apocalyptic number.

It is an amenable number.

556649450861 is a deficient number, since it is larger than the sum of its proper divisors (131102772499).

556649450861 is a wasteful number, since it uses less digits than its factorization.

556649450861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113117204.

The product of its (nonzero) digits is 31104000, while the sum is 59.

The spelling of 556649450861 in words is "five hundred fifty-six billion, six hundred forty-nine million, four hundred fifty thousand, eight hundred sixty-one".