616500720 has 420 divisors, whose sum is σ = 2422498968. Its totient is φ = 144633600.

The previous prime is 616500713. The next prime is 616500721. The reversal of 616500720 is 27005616.

616500720 is a `hidden beast` number, since 6 + 1 + 650 + 0 + 7 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616500721) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 19887105 + ... + 19887135.

Almost surely, 2^616500720 is an apocalyptic number.

616500720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 616500720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1211249484).

616500720 is an abundant number, since it is smaller than the sum of its proper divisors (1805998248).

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

616500720 is a wasteful number, since it uses less digits than its factorization.

616500720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 616500720 is about 24829.4325347963. The cubic root of 616500720 is about 851.0946542584.

The spelling of 616500720 in words is "six hundred sixteen million, five hundred thousand, seven hundred twenty".