5556445921 has 8 divisors (see below), whose sum is σ = 6176893184. Its totient is φ = 4963574160.

The previous prime is 5556445913. The next prime is 5556445927. The reversal of 5556445921 is 1295446555.

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

It is a cyclic number.

It is not a de Polignac number, because 5556445921 - 2³ = 5556445913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5556445927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6893451 + ... + 6894256.

It is an arithmetic number, because the mean of its divisors is an integer number (772111648).

Almost surely, 2^5556445921 is an apocalyptic number.

It is an amenable number.

5556445921 is a deficient number, since it is larger than the sum of its proper divisors (620447263).

5556445921 is a wasteful number, since it uses less digits than its factorization.

5556445921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13787751.

The product of its digits is 1080000, while the sum is 46.

The square root of 5556445921 is about 74541.5717636810. The cubic root of 5556445921 is about 1771.1922256972.

The spelling of 5556445921 in words is "five billion, five hundred fifty-six million, four hundred forty-five thousand, nine hundred twenty-one".