5561375820 has 768 divisors, whose sum is σ = 22543073280. Its totient is φ = 987033600.

The previous prime is 5561375797. The next prime is 5561375837. The reversal of 5561375820 is 285731655.

It is a super-2 number, since 2×5561375820² = 61857802022561344800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 53993889 + ... + 53993991.

It is an arithmetic number, because the mean of its divisors is an integer number (29352960).

Almost surely, 2^5561375820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5561375820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11271536640).

5561375820 is an abundant number, since it is smaller than the sum of its proper divisors (16981697460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5561375820 is a wasteful number, since it uses less digits than its factorization.

5561375820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 42.

The square root of 5561375820 is about 74574.6325502178. The cubic root of 5561375820 is about 1771.7158948303.

The spelling of 5561375820 in words is "five billion, five hundred sixty-one million, three hundred seventy-five thousand, eight hundred twenty".