556172345 has 16 divisors (see below), whose sum is σ = 686835408. Its totient is φ = 432034560.

The previous prime is 556172297. The next prime is 556172347. The reversal of 556172345 is 543271655.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 75203584 + 480968761 = 8672^2 + 21931^2 .

It is not a de Polignac number, because 556172345 - 2¹⁴ = 556155961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 556172299 and 556172308.

It is not an unprimeable number, because it can be changed into a prime (556172347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97307 + ... + 102863.

It is an arithmetic number, because the mean of its divisors is an integer number (42927213).

Almost surely, 2^556172345 is an apocalyptic number.

It is an amenable number.

556172345 is a deficient number, since it is larger than the sum of its proper divisors (130663063).

556172345 is a wasteful number, since it uses less digits than its factorization.

556172345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6140.

The product of its digits is 126000, while the sum is 38.

The square root of 556172345 is about 23583.3064899729. The cubic root of 556172345 is about 822.3748056416.

The spelling of 556172345 in words is "five hundred fifty-six million, one hundred seventy-two thousand, three hundred forty-five".