206620163516 has 12 divisors (see below), whose sum is σ = 389399539032. Its totient is φ = 95363152368.

The previous prime is 206620163507. The next prime is 206620163537. The reversal of 206620163516 is 615361026602.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 206620163516.

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, 1986732290 + ... + 1986732393.

It is an arithmetic number, because the mean of its divisors is an integer number (32449961586).

Almost surely, 2^206620163516 is an apocalyptic number.

206620163516 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

206620163516 is a deficient number, since it is larger than the sum of its proper divisors (182779375516).

206620163516 is a wasteful number, since it uses less digits than its factorization.

206620163516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973464700 (or 3973464698 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 206620163516 in words is "two hundred six billion, six hundred twenty million, one hundred sixty-three thousand, five hundred sixteen".