205687864630 has 8 divisors (see below), whose sum is σ = 370238156352. Its totient is φ = 82275145848.

The previous prime is 205687864621. The next prime is 205687864631. The reversal of 205687864630 is 36468786502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205687864631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10284393222 + ... + 10284393241.

It is an arithmetic number, because the mean of its divisors is an integer number (46279769544).

Almost surely, 2^205687864630 is an apocalyptic number.

205687864630 is a deficient number, since it is larger than the sum of its proper divisors (164550291722).

205687864630 is a wasteful number, since it uses less digits than its factorization.

205687864630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20568786470.

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 205687864630 in words is "two hundred five billion, six hundred eighty-seven million, eight hundred sixty-four thousand, six hundred thirty".