556544321421 has 32 divisors (see below), whose sum is σ = 822272833536. Its totient is φ = 331993728000.

The previous prime is 556544321383. The next prime is 556544321479. The reversal of 556544321421 is 124123445655.

It is not a de Polignac number, because 556544321421 - 2⁷ = 556544321293 is a prime.

It is a super-2 number, since 2×556544321421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556544322421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2619501 + ... + 2823981.

It is an arithmetic number, because the mean of its divisors is an integer number (25696026048).

Almost surely, 2^556544321421 is an apocalyptic number.

It is an amenable number.

556544321421 is a deficient number, since it is larger than the sum of its proper divisors (265728512115).

556544321421 is a wasteful number, since it uses less digits than its factorization.

556544321421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205793.

The product of its digits is 576000, while the sum is 42.

The spelling of 556544321421 in words is "five hundred fifty-six billion, five hundred forty-four million, three hundred twenty-one thousand, four hundred twenty-one".