206791456811 has 4 divisors (see below), whose sum is σ = 206911476792. Its totient is φ = 206671436832.

The previous prime is 206791456801. The next prime is 206791456843. The reversal of 206791456811 is 118654197602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206791456811 - 2¹⁸ = 206791194667 is a prime.

It is a super-2 number, since 2×206791456811² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206791456811.

It is not an unprimeable number, because it can be changed into a prime (206791456801) 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, 60007406 + ... + 60010851.

It is an arithmetic number, because the mean of its divisors is an integer number (51727869198).

Almost surely, 2^206791456811 is an apocalyptic number.

206791456811 is a deficient number, since it is larger than the sum of its proper divisors (120019981).

206791456811 is a wasteful number, since it uses less digits than its factorization.

206791456811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120019980.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 206791456811 in words is "two hundred six billion, seven hundred ninety-one million, four hundred fifty-six thousand, eight hundred eleven".