206763912369 has 81 divisors (see below), whose sum is σ = 354373496217. Its totient is φ = 115831770768.

The previous prime is 206763912281. The next prime is 206763912431. The reversal of 206763912369 is 963219367602.

The square root of 206763912369 is 454713.

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

206763912369 is a `hidden beast` number, since 206 + 7 + 63 + 9 + 12 + 369 = 666.

It is not a de Polignac number, because 206763912369 - 2⁹ = 206763911857 is a prime.

It is a super-2 number, since 2×206763912369² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206763910369) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 563389224 + ... + 563389590.

Almost surely, 2^206763912369 is an apocalyptic number.

206763912369 is the 454713-rd square number.

206763912369 is the 227357-th centered octagonal number.

It is an amenable number.

206763912369 is a deficient number, since it is larger than the sum of its proper divisors (147609583848).

206763912369 is an frugal number, since it uses more digits than its factorization.

206763912369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 54.

The spelling of 206763912369 in words is "two hundred six billion, seven hundred sixty-three million, nine hundred twelve thousand, three hundred sixty-nine".