205147031655180 has 96 divisors (see below), whose sum is σ = 575122102994880. Its totient is φ = 54638254494720.

The previous prime is 205147031655173. The next prime is 205147031655211. The reversal of 205147031655180 is 81556130741502.

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 31 ways as a sum of consecutive naturals, for example, 173158666 + ... + 174339374.

It is an arithmetic number, because the mean of its divisors is an integer number (5990855239530).

Almost surely, 2^{205147031655180} is an apocalyptic number.

205147031655180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205147031655180 is an abundant number, since it is smaller than the sum of its proper divisors (369975071339700).

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

205147031655180 is a wasteful number, since it uses less digits than its factorization.

205147031655180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184299 (or 1184297 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 48.

The spelling of 205147031655180 in words is "two hundred five trillion, one hundred forty-seven billion, thirty-one million, six hundred fifty-five thousand, one hundred eighty".