616728272180 has 54 divisors (see below), whose sum is σ = 1327798360518. Its totient is φ = 240618254720.

The previous prime is 616728272161. The next prime is 616728272189. The reversal of 616728272180 is 81272827616.

It can be written as a sum of positive squares in 3 ways, for example, as 35514156304 + 581214115876 = 188452^2 + 762374^2 .

It is a super-2 number, since 2×616728272180² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616728272189) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 143992319 + ... + 143996601.

Almost surely, 2^616728272180 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 616728272180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (663899180259).

616728272180 is an abundant number, since it is smaller than the sum of its proper divisors (711070088338).

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

616728272180 is an frugal number, since it uses more digits than its factorization.

616728272180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8657 (or 4331 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 50.

The spelling of 616728272180 in words is "six hundred sixteen billion, seven hundred twenty-eight million, two hundred seventy-two thousand, one hundred eighty".