216576727720 has 16 divisors (see below), whose sum is σ = 487297637460. Its totient is φ = 86630691072.

The previous prime is 216576727693. The next prime is 216576727729. The reversal of 216576727720 is 27727675612.

It can be written as a sum of positive squares in 2 ways, for example, as 216189661444 + 387066276 = 464962^2 + 19674^2 .

It is not an unprimeable number, because it can be changed into a prime (216576727729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2707209057 + ... + 2707209136.

Almost surely, 2^216576727720 is an apocalyptic number.

216576727720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216576727720 is an abundant number, since it is smaller than the sum of its proper divisors (270720909740).

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

216576727720 is a wasteful number, since it uses less digits than its factorization.

216576727720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5414418204 (or 5414418200 counting only the distinct ones).

The product of its (nonzero) digits is 3457440, while the sum is 52.

The spelling of 216576727720 in words is "two hundred sixteen billion, five hundred seventy-six million, seven hundred twenty-seven thousand, seven hundred twenty".