206611112656 has 20 divisors (see below), whose sum is σ = 431102033572. Its totient is φ = 95358974976.

The previous prime is 206611112639. The next prime is 206611112663. The reversal of 206611112656 is 656211116602.

It can be written as a sum of positive squares in 2 ways, for example, as 35698323600 + 170912789056 = 188940^2 + 413416^2 .

It is a congruent number.

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, 496661121 + ... + 496661536.

Almost surely, 2^206611112656 is an apocalyptic number.

206611112656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

206611112656 is an abundant number, since it is smaller than the sum of its proper divisors (224490920916).

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

206611112656 is a wasteful number, since it uses less digits than its factorization.

206611112656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993322678 (or 993322672 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 206611112656 in words is "two hundred six billion, six hundred eleven million, one hundred twelve thousand, six hundred fifty-six".