205948539078 has 32 divisors (see below), whose sum is σ = 413296291296. Its totient is φ = 68416416768.

The previous prime is 205948538993. The next prime is 205948539101. The reversal of 205948539078 is 870935849502.

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 15 ways as a sum of consecutive naturals, for example, 9790500 + ... + 9811512.

It is an arithmetic number, because the mean of its divisors is an integer number (12915509103).

Almost surely, 2^205948539078 is an apocalyptic number.

205948539078 is an abundant number, since it is smaller than the sum of its proper divisors (207347752218).

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

205948539078 is a wasteful number, since it uses less digits than its factorization.

205948539078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26488.

The product of its (nonzero) digits is 21772800, while the sum is 60.

The spelling of 205948539078 in words is "two hundred five billion, nine hundred forty-eight million, five hundred thirty-nine thousand, seventy-eight".