206700488649 has 12 divisors (see below), whose sum is σ = 299729116596. Its totient is φ = 137264136192.

The previous prime is 206700488627. The next prime is 206700488699. The reversal of 206700488649 is 946884007602.

It can be written as a sum of positive squares in 2 ways, for example, as 99898980624 + 106801508025 = 316068^2 + 326805^2 .

It is a de Polignac number, because none of the positive numbers 2^k-206700488649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206700488595 and 206700488604.

It is not an unprimeable number, because it can be changed into a prime (206700488699) 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, 44680024 + ... + 44684649.

It is an arithmetic number, because the mean of its divisors is an integer number (24977426383).

Almost surely, 2^206700488649 is an apocalyptic number.

It is an amenable number.

206700488649 is a deficient number, since it is larger than the sum of its proper divisors (93028627947).

206700488649 is a wasteful number, since it uses less digits than its factorization.

206700488649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89364936 (or 89364933 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 206700488649 in words is "two hundred six billion, seven hundred million, four hundred eighty-eight thousand, six hundred forty-nine".