206734811761 has 9 divisors (see below), whose sum is σ = 207753270841. Its totient is φ = 205721327812.

The previous prime is 206734811753. The next prime is 206734811797. The reversal of 206734811761 is 167118437602.

The square root of 206734811761 is 454681.

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

It is not a de Polignac number, because 206734811761 - 2³ = 206734811753 is a prime.

It is a super-2 number, since 2×206734811761² (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 (206734811461) 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, 103211586 + ... + 103213588.

Almost surely, 2^206734811761 is an apocalyptic number.

206734811761 is the 454681-st square number.

206734811761 is the 227341-st centered octagonal number.

It is an amenable number.

206734811761 is a deficient number, since it is larger than the sum of its proper divisors (1018459080).

206734811761 is an frugal number, since it uses more digits than its factorization.

206734811761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4460 (or 2230 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 206734811761 in words is "two hundred six billion, seven hundred thirty-four million, eight hundred eleven thousand, seven hundred sixty-one".