205743450550 has 24 divisors (see below), whose sum is σ = 417472166232. Its totient is φ = 74815800000.

The previous prime is 205743450527. The next prime is 205743450557. The reversal of 205743450550 is 55054347502.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205743450557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187038951 + ... + 187040050.

It is an arithmetic number, because the mean of its divisors is an integer number (17394673593).

Almost surely, 2^205743450550 is an apocalyptic number.

205743450550 is an abundant number, since it is smaller than the sum of its proper divisors (211728715682).

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

205743450550 is a wasteful number, since it uses less digits than its factorization.

205743450550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374079024 (or 374079019 counting only the distinct ones).

The product of its (nonzero) digits is 420000, while the sum is 40.

The spelling of 205743450550 in words is "two hundred five billion, seven hundred forty-three million, four hundred fifty thousand, five hundred fifty".