5561920980 has 288 divisors, whose sum is σ = 21192837120. Its totient is φ = 1147011840.

The previous prime is 5561920979. The next prime is 5561920981. The reversal of 5561920980 is 890291655.

5561920980 is a `hidden beast` number, since 5 + 5 + 619 + 20 + 9 + 8 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (5561920979) and next prime (5561920981).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561920981) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1925097 + ... + 1927983.

It is an arithmetic number, because the mean of its divisors is an integer number (73586240).

Almost surely, 2^5561920980 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 5561920980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10596418560).

5561920980 is an abundant number, since it is smaller than the sum of its proper divisors (15630916140).

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

5561920980 is a wasteful number, since it uses less digits than its factorization.

5561920980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3059 (or 3054 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 5561920980 is about 74578.2875909604. The cubic root of 5561920980 is about 1771.7737844071.

The spelling of 5561920980 in words is "five billion, five hundred sixty-one million, nine hundred twenty thousand, nine hundred eighty".