205517241740 has 12 divisors (see below), whose sum is σ = 431586207696. Its totient is φ = 82206896688.

The previous prime is 205517241701. The next prime is 205517241821. The reversal of 205517241740 is 47142715502.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 205517241694 and 205517241703.

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, 5137931024 + ... + 5137931063.

It is an arithmetic number, because the mean of its divisors is an integer number (35965517308).

Almost surely, 2^205517241740 is an apocalyptic number.

205517241740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205517241740 is an abundant number, since it is smaller than the sum of its proper divisors (226068965956).

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

205517241740 is a wasteful number, since it uses less digits than its factorization.

205517241740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10275862096 (or 10275862094 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The spelling of 205517241740 in words is "two hundred five billion, five hundred seventeen million, two hundred forty-one thousand, seven hundred forty".