206622608640 has 576 divisors, whose sum is σ = 812423872512. Its totient is φ = 43713331200.

The previous prime is 206622608639. The next prime is 206622608653. The reversal of 206622608640 is 46806226602.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 206622608592 and 206622608601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19160050 + ... + 19170830.

It is an arithmetic number, because the mean of its divisors is an integer number (1410458112).

Almost surely, 2^206622608640 is an apocalyptic number.

206622608640 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 206622608640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406211936256).

206622608640 is an abundant number, since it is smaller than the sum of its proper divisors (605801263872).

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

206622608640 is a wasteful number, since it uses less digits than its factorization.

206622608640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10866 (or 10852 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 42.

The spelling of 206622608640 in words is "two hundred six billion, six hundred twenty-two million, six hundred eight thousand, six hundred forty".