206078092749 has 12 divisors (see below), whose sum is σ = 298218582012. Its totient is φ = 137131444800.

The previous prime is 206078092747. The next prime is 206078092751. The reversal of 206078092749 is 947290870602.

206078092749 is a `hidden beast` number, since 2 + 0 + 607 + 8 + 0 + 9 + 27 + 4 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (206078092747) and next prime (206078092751).

It can be written as a sum of positive squares in 2 ways, for example, as 79196090724 + 126882002025 = 281418^2 + 356205^2 .

It is not a de Polignac number, because 206078092749 - 2¹ = 206078092747 is a prime.

It is a super-2 number, since 2×206078092749² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 206078092695 and 206078092704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206078092747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21157392 + ... + 21167129.

It is an arithmetic number, because the mean of its divisors is an integer number (24851548501).

Almost surely, 2^206078092749 is an apocalyptic number.

It is an amenable number.

206078092749 is a deficient number, since it is larger than the sum of its proper divisors (92140489263).

206078092749 is a wasteful number, since it uses less digits than its factorization.

206078092749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42325068 (or 42325065 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 206078092749 in words is "two hundred six billion, seventy-eight million, ninety-two thousand, seven hundred forty-nine".