206143642408 has 32 divisors (see below), whose sum is σ = 422052084000. Its totient is φ = 93613959360.

The previous prime is 206143642363. The next prime is 206143642417. The reversal of 206143642408 is 804246341602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1001598 + ... + 1189741.

It is an arithmetic number, because the mean of its divisors is an integer number (13189127625).

Almost surely, 2^206143642408 is an apocalyptic number.

It is an amenable number.

206143642408 is an abundant number, since it is smaller than the sum of its proper divisors (215908441592).

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

206143642408 is a wasteful number, since it uses less digits than its factorization.

206143642408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192425 (or 2192421 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 40.

The spelling of 206143642408 in words is "two hundred six billion, one hundred forty-three million, six hundred forty-two thousand, four hundred eight".