616720720 has 160 divisors (see below), whose sum is σ = 1822383360. Its totient is φ = 188497920.

The previous prime is 616720711. The next prime is 616720721. The reversal of 616720720 is 27027616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616720721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 325536 + ... + 327424.

It is an arithmetic number, because the mean of its divisors is an integer number (11389896).

Almost surely, 2^616720720 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 616720720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (911191680).

616720720 is an abundant number, since it is smaller than the sum of its proper divisors (1205662640).

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

616720720 is a wasteful number, since it uses less digits than its factorization.

616720720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973 (or 1967 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 616720720 is about 24833.8623657296. The cubic root of 616720720 is about 851.1958807181.

The spelling of 616720720 in words is "six hundred sixteen million, seven hundred twenty thousand, seven hundred twenty".