205263663630 has 32 divisors (see below), whose sum is σ = 494094635424. Its totient is φ = 54574550016.

The previous prime is 205263663559. The next prime is 205263663637. The reversal of 205263663630 is 36366362502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205263663637) 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, 10141407 + ... + 10161626.

It is an arithmetic number, because the mean of its divisors is an integer number (15440457357).

Almost surely, 2^205263663630 is an apocalyptic number.

205263663630 is an abundant number, since it is smaller than the sum of its proper divisors (288830971794).

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

205263663630 is a wasteful number, since it uses less digits than its factorization.

205263663630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20303380.

The product of its (nonzero) digits is 699840, while the sum is 42.

The spelling of 205263663630 in words is "two hundred five billion, two hundred sixty-three million, six hundred sixty-three thousand, six hundred thirty".