206839401616 has 45 divisors (see below), whose sum is σ = 407061849369. Its totient is φ = 101816090112.

The previous prime is 206839401599. The next prime is 206839401617. The reversal of 206839401616 is 616104938602.

The square root of 206839401616 is 454796.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 199112288400 + 7727113216 = 446220^2 + 87904^2 .

It is a super-2 number, since 2×206839401616² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206839401617) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 121884480 + ... + 121886176.

Almost surely, 2^206839401616 is an apocalyptic number.

206839401616 is the 454796-th square number.

It is an amenable number.

206839401616 is a deficient number, since it is larger than the sum of its proper divisors (200222447753).

206839401616 is an frugal number, since it uses more digits than its factorization.

206839401616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536 (or 1766 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 206839401616 in words is "two hundred six billion, eight hundred thirty-nine million, four hundred one thousand, six hundred sixteen".