206635236040 has 16 divisors (see below), whose sum is σ = 464929281180. Its totient is φ = 82654094400.

The previous prime is 206635236037. The next prime is 206635236053. The reversal of 206635236040 is 40632536602.

It can be written as a sum of positive squares in 2 ways, for example, as 186135296356 + 20499939684 = 431434^2 + 143178^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2582940411 + ... + 2582940490.

Almost surely, 2^206635236040 is an apocalyptic number.

206635236040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206635236040 is an abundant number, since it is smaller than the sum of its proper divisors (258294045140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206635236040 is a wasteful number, since it uses less digits than its factorization.

206635236040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5165880912 (or 5165880908 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 37.

The spelling of 206635236040 in words is "two hundred six billion, six hundred thirty-five million, two hundred thirty-six thousand, forty".