205428215968626 has 64 divisors (see below), whose sum is σ = 482790632723712. Its totient is φ = 57042340515072.

The previous prime is 205428215968603. The next prime is 205428215968627. The reversal of 205428215968626 is 626869512824502.

It is not an unprimeable number, because it can be changed into a prime (205428215968627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74003841 + ... + 76729556.

It is an arithmetic number, because the mean of its divisors is an integer number (7543603636308).

Almost surely, 2^{205428215968626} is an apocalyptic number.

205428215968626 is an abundant number, since it is smaller than the sum of its proper divisors (277362416755086).

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

205428215968626 is a wasteful number, since it uses less digits than its factorization.

205428215968626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150734323.

The product of its (nonzero) digits is 199065600, while the sum is 66.

The spelling of 205428215968626 in words is "two hundred five trillion, four hundred twenty-eight billion, two hundred fifteen million, nine hundred sixty-eight thousand, six hundred twenty-six".