205254021144 has 16 divisors (see below), whose sum is σ = 513135052920. Its totient is φ = 68418007040.

The previous prime is 205254021127. The next prime is 205254021157. The reversal of 205254021144 is 441120452502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4276125417 + ... + 4276125464.

Almost surely, 2^205254021144 is an apocalyptic number.

205254021144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

205254021144 is an abundant number, since it is smaller than the sum of its proper divisors (307881031776).

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

205254021144 is a wasteful number, since it uses less digits than its factorization.

205254021144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8552250890 (or 8552250886 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 205254021144 its reverse (441120452502), we get a palindrome (646374473646).

The spelling of 205254021144 in words is "two hundred five billion, two hundred fifty-four million, twenty-one thousand, one hundred forty-four".