206153102172 has 24 divisors (see below), whose sum is σ = 488909544592. Its totient is φ = 67591180800.

The previous prime is 206153102147. The next prime is 206153102219. The reversal of 206153102172 is 271201351602.

It is a super-3 number, since 3×206153102172³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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, 140814229 + ... + 140815692.

Almost surely, 2^206153102172 is an apocalyptic number.

It is an amenable number.

206153102172 is an abundant number, since it is smaller than the sum of its proper divisors (282756442420).

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

206153102172 is a wasteful number, since it uses less digits than its factorization.

206153102172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281629989 (or 281629987 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

Adding to 206153102172 its reverse (271201351602), we get a palindrome (477354453774).

The spelling of 206153102172 in words is "two hundred six billion, one hundred fifty-three million, one hundred two thousand, one hundred seventy-two".