556166727831 has 64 divisors (see below), whose sum is σ = 886932426240. Its totient is φ = 305534423040.

The previous prime is 556166727803. The next prime is 556166727839. The reversal of 556166727831 is 138727661655.

556166727831 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 556166727831 - 2¹⁴ = 556166711447 is a prime.

It is a super-2 number, since 2×556166727831² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556166727839) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24109855 + ... + 24132911.

It is an arithmetic number, because the mean of its divisors is an integer number (13858319160).

Almost surely, 2^556166727831 is an apocalyptic number.

556166727831 is a deficient number, since it is larger than the sum of its proper divisors (330765698409).

556166727831 is a wasteful number, since it uses less digits than its factorization.

556166727831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24096.

The product of its digits is 12700800, while the sum is 57.

The spelling of 556166727831 in words is "five hundred fifty-six billion, one hundred sixty-six million, seven hundred twenty-seven thousand, eight hundred thirty-one".