5556811645 has 32 divisors (see below), whose sum is σ = 8490479616. Its totient is φ = 3390273600.

The previous prime is 5556811643. The next prime is 5556811651. The reversal of 5556811645 is 5461186555.

It is not a de Polignac number, because 5556811645 - 2¹ = 5556811643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5556811595 and 5556811604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5556811643) 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, 135451 + ... + 171640.

It is an arithmetic number, because the mean of its divisors is an integer number (265327488).

Almost surely, 2^5556811645 is an apocalyptic number.

5556811645 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5556811645 is a deficient number, since it is larger than the sum of its proper divisors (2933667971).

5556811645 is a wasteful number, since it uses less digits than its factorization.

5556811645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307161.

The product of its digits is 720000, while the sum is 46.

The square root of 5556811645 is about 74544.0248779203. The cubic root of 5556811645 is about 1771.2310846671.

The spelling of 5556811645 in words is "five billion, five hundred fifty-six million, eight hundred eleven thousand, six hundred forty-five".