556855558655 has 24 divisors (see below), whose sum is σ = 735573028176. Its totient is φ = 404392609280.

The previous prime is 556855558591. The next prime is 556855558657.

556855558655 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 556855558655 - 2⁶ = 556855558591 is a prime.

It is a super-2 number, since 2×556855558655² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556855558657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 260594 + ... + 1087023.

It is an arithmetic number, because the mean of its divisors is an integer number (30648876174).

Almost surely, 2^556855558655 is an apocalyptic number.

556855558655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

556855558655 is a deficient number, since it is larger than the sum of its proper divisors (178717469521).

556855558655 is a wasteful number, since it uses less digits than its factorization.

556855558655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348327 (or 1348316 counting only the distinct ones).

The product of its digits is 900000000, while the sum is 68.

The spelling of 556855558655 in words is "five hundred fifty-six billion, eight hundred fifty-five million, five hundred fifty-eight thousand, six hundred fifty-five".