205065500071998 has 32 divisors (see below), whose sum is σ = 414741140352000. Its totient is φ = 67586817125696.

The previous prime is 205065500071987. The next prime is 205065500072057. The reversal of 205065500071998 is 899170005560502.

It is a happy number.

It is a super-2 number, since 2×205065500071998² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132948403 + ... + 134482001.

It is an arithmetic number, because the mean of its divisors is an integer number (12960660636000).

Almost surely, 2^{205065500071998} is an apocalyptic number.

205065500071998 is an abundant number, since it is smaller than the sum of its proper divisors (209675640280002).

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

205065500071998 is a wasteful number, since it uses less digits than its factorization.

205065500071998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784096.

The product of its (nonzero) digits is 6804000, while the sum is 57.

The spelling of 205065500071998 in words is "two hundred five trillion, sixty-five billion, five hundred million, seventy-one thousand, nine hundred ninety-eight".