216571064260 has 12 divisors (see below), whose sum is σ = 454799234988. Its totient is φ = 86628425696.

The previous prime is 216571064249. The next prime is 216571064287. The reversal of 216571064260 is 62460175612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27048407296 + 189522656964 = 164464^2 + 435342^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5414276587 + ... + 5414276626.

It is an arithmetic number, because the mean of its divisors is an integer number (37899936249).

Almost surely, 2^216571064260 is an apocalyptic number.

216571064260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216571064260 is an abundant number, since it is smaller than the sum of its proper divisors (238228170728).

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

216571064260 is a wasteful number, since it uses less digits than its factorization.

216571064260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10828553222 (or 10828553220 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 216571064260 in words is "two hundred sixteen billion, five hundred seventy-one million, sixty-four thousand, two hundred sixty".