205473748782 has 16 divisors (see below), whose sum is σ = 420504416640. Its totient is φ = 66898429752.

The previous prime is 205473748759. The next prime is 205473748787. The reversal of 205473748782 is 287847374502.

It is a super-2 number, since 2×205473748782² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205473748787) 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, 398204682 + ... + 398205197.

It is an arithmetic number, because the mean of its divisors is an integer number (26281526040).

Almost surely, 2^205473748782 is an apocalyptic number.

205473748782 is an abundant number, since it is smaller than the sum of its proper divisors (215030667858).

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

205473748782 is a wasteful number, since it uses less digits than its factorization.

205473748782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796409927.

The product of its (nonzero) digits is 21073920, while the sum is 57.

The spelling of 205473748782 in words is "two hundred five billion, four hundred seventy-three million, seven hundred forty-eight thousand, seven hundred eighty-two".