5618920720 has 80 divisors (see below), whose sum is σ = 15110282880. Its totient is φ = 1903260672.

The previous prime is 5618920691. The next prime is 5618920721. The reversal of 5618920720 is 270298165.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (5618920721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13965 + ... + 106924.

It is an arithmetic number, because the mean of its divisors is an integer number (188878536).

Almost surely, 2^5618920720 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 5618920720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7555141440).

5618920720 is an abundant number, since it is smaller than the sum of its proper divisors (9491362160).

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

5618920720 is a wasteful number, since it uses less digits than its factorization.

5618920720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120992 (or 120986 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 5618920720 is about 74959.4605103318. The cubic root of 5618920720 is about 1777.8057294332.

The spelling of 5618920720 in words is "five billion, six hundred eighteen million, nine hundred twenty thousand, seven hundred twenty".