206308677748 has 6 divisors (see below), whose sum is σ = 361040186066. Its totient is φ = 103154338872.

The previous prime is 206308677719. The next prime is 206308677779. The reversal of 206308677748 is 847776803602.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 193575360784 + 12733316964 = 439972^2 + 112842^2 .

It is a super-2 number, since 2×206308677748² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206308677692 and 206308677701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25788584715 + ... + 25788584722.

Almost surely, 2^206308677748 is an apocalyptic number.

It is an amenable number.

206308677748 is a deficient number, since it is larger than the sum of its proper divisors (154731508318).

206308677748 is a wasteful number, since it uses less digits than its factorization.

206308677748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51577169441 (or 51577169439 counting only the distinct ones).

The product of its (nonzero) digits is 18966528, while the sum is 58.

The spelling of 206308677748 in words is "two hundred six billion, three hundred eight million, six hundred seventy-seven thousand, seven hundred forty-eight".