205654746040 has 32 divisors (see below), whose sum is σ = 462737493360. Its totient is φ = 82259353600.

The previous prime is 205654746013. The next prime is 205654746107. The reversal of 205654746040 is 40647456502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1748280 + ... + 1862200.

Almost surely, 2^205654746040 is an apocalyptic number.

205654746040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205654746040 is an abundant number, since it is smaller than the sum of its proper divisors (257082747320).

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

205654746040 is a wasteful number, since it uses less digits than its factorization.

205654746040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159063 (or 159059 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 43.

The spelling of 205654746040 in words is "two hundred five billion, six hundred fifty-four million, seven hundred forty-six thousand, forty".