206609150720 has 144 divisors (see below), whose sum is σ = 577136481600. Its totient is φ = 70837272576.

The previous prime is 206609150711. The next prime is 206609150723. The reversal of 206609150720 is 27051906602.

It is a happy number.

It is a super-2 number, since 2×206609150720² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206609150723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203744 + ... + 674336.

Almost surely, 2^206609150720 is an apocalyptic number.

206609150720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206609150720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288568240800).

206609150720 is an abundant number, since it is smaller than the sum of its proper divisors (370527330880).

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

206609150720 is an frugal number, since it uses more digits than its factorization.

206609150720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470635 (or 470607 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 206609150720 in words is "two hundred six billion, six hundred nine million, one hundred fifty thousand, seven hundred twenty".