205531899260 has 12 divisors (see below), whose sum is σ = 431616988488. Its totient is φ = 82212759696.

The previous prime is 205531899233. The next prime is 205531899301. The reversal of 205531899260 is 62998135502.

It is a super-2 number, since 2×205531899260² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205531899199 and 205531899208.

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, 5138297462 + ... + 5138297501.

It is an arithmetic number, because the mean of its divisors is an integer number (35968082374).

Almost surely, 2^205531899260 is an apocalyptic number.

205531899260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205531899260 is an abundant number, since it is smaller than the sum of its proper divisors (226085089228).

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

205531899260 is a wasteful number, since it uses less digits than its factorization.

205531899260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10276594972 (or 10276594970 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 205531899260 in words is "two hundred five billion, five hundred thirty-one million, eight hundred ninety-nine thousand, two hundred sixty".