205199056782 has 16 divisors (see below), whose sum is σ = 455997904080. Its totient is φ = 68399685576.

The previous prime is 205199056781. The next prime is 205199056793. The reversal of 205199056782 is 287650991502.

205199056782 is a `hidden beast` number, since 2 + 0 + 519 + 9 + 0 + 56 + 78 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 3799982533 = 205199056782 / (2 + 0 + 5 + 1 + 9 + 9 + 0 + 5 + 6 + 7 + 8 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205199056781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1899991213 + ... + 1899991320.

It is an arithmetic number, because the mean of its divisors is an integer number (28499869005).

Almost surely, 2^205199056782 is an apocalyptic number.

205199056782 is an abundant number, since it is smaller than the sum of its proper divisors (250798847298).

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

205199056782 is a wasteful number, since it uses less digits than its factorization.

205199056782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3799982544 (or 3799982538 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 205199056782 in words is "two hundred five billion, one hundred ninety-nine million, fifty-six thousand, seven hundred eighty-two".