556172778903 has 8 divisors (see below), whose sum is σ = 847501377408. Its totient is φ = 317813016504.

The previous prime is 556172778893. The next prime is 556172778929. The reversal of 556172778903 is 309877271655.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 556172778903 - 2⁸ = 556172778647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556172778503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13242209001 + ... + 13242209042.

It is an arithmetic number, because the mean of its divisors is an integer number (105937672176).

Almost surely, 2^556172778903 is an apocalyptic number.

556172778903 is a deficient number, since it is larger than the sum of its proper divisors (291328598505).

556172778903 is a wasteful number, since it uses less digits than its factorization.

556172778903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26484418053.

The product of its (nonzero) digits is 22226400, while the sum is 60.

The spelling of 556172778903 in words is "five hundred fifty-six billion, one hundred seventy-two million, seven hundred seventy-eight thousand, nine hundred three".