206147863188 has 72 divisors (see below), whose sum is σ = 540867466048. Its totient is φ = 68655983616.

The previous prime is 206147863121. The next prime is 206147863199. The reversal of 206147863188 is 881368741602.

206147863188 is a `hidden beast` number, since 2 + 0 + 61 + 478 + 6 + 31 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1028745 + ... + 1212687.

Almost surely, 2^206147863188 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206147863188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270433733024).

206147863188 is an abundant number, since it is smaller than the sum of its proper divisors (334719602860).

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

206147863188 is a wasteful number, since it uses less digits than its factorization.

206147863188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185115 (or 185101 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 206147863188 in words is "two hundred six billion, one hundred forty-seven million, eight hundred sixty-three thousand, one hundred eighty-eight".