205961616368 has 20 divisors (see below), whose sum is σ = 420053297160. Its totient is φ = 97560765504.

The previous prime is 205961616359. The next prime is 205961616373. The reversal of 205961616368 is 863616169502.

It is a happy number.

It is a super-2 number, since 2×205961616368² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338752355 + ... + 338752962.

It is an arithmetic number, because the mean of its divisors is an integer number (21002664858).

Almost surely, 2^205961616368 is an apocalyptic number.

It is an amenable number.

205961616368 is an abundant number, since it is smaller than the sum of its proper divisors (214091680792).

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

205961616368 is a wasteful number, since it uses less digits than its factorization.

205961616368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677505344 (or 677505338 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 205961616368 in words is "two hundred five billion, nine hundred sixty-one million, six hundred sixteen thousand, three hundred sixty-eight".