205785920076 has 48 divisors (see below), whose sum is σ = 523873018368. Its totient is φ = 62352904000.

The previous prime is 205785920069. The next prime is 205785920117. The reversal of 205785920076 is 670029587502.

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 15 ways as a sum of consecutive naturals, for example, 1284061 + ... + 1435403.

It is an arithmetic number, because the mean of its divisors is an integer number (10914021216).

Almost surely, 2^205785920076 is an apocalyptic number.

It is an amenable number.

205785920076 is an abundant number, since it is smaller than the sum of its proper divisors (318087098292).

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

205785920076 is a wasteful number, since it uses less digits than its factorization.

205785920076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161662 (or 161660 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 51.

The spelling of 205785920076 in words is "two hundred five billion, seven hundred eighty-five million, nine hundred twenty thousand, seventy-six".