556221005623 has 4 divisors (see below), whose sum is σ = 556225569040. Its totient is φ = 556216442208.

The previous prime is 556221005537. The next prime is 556221005689. The reversal of 556221005623 is 326500122655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 556221005623 - 2²¹ = 556218908471 is a prime.

It is a super-2 number, since 2×556221005623² (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 (556221005023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2093715 + ... + 2344372.

It is an arithmetic number, because the mean of its divisors is an integer number (139056392260).

Almost surely, 2^556221005623 is an apocalyptic number.

556221005623 is a deficient number, since it is larger than the sum of its proper divisors (4563417).

556221005623 is a wasteful number, since it uses less digits than its factorization.

556221005623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4563416.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 556221005623 in words is "five hundred fifty-six billion, two hundred twenty-one million, five thousand, six hundred twenty-three".