205481138384 has 20 divisors (see below), whose sum is σ = 411847972260. Its totient is φ = 99197790720.

The previous prime is 205481138339. The next prime is 205481138399. The reversal of 205481138384 is 483831184502.

It can be written as a sum of positive squares in 2 ways, for example, as 116641374784 + 88839763600 = 341528^2 + 298060^2 .

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, 221423177 + ... + 221424104.

It is an arithmetic number, because the mean of its divisors is an integer number (20592398613).

Almost surely, 2^205481138384 is an apocalyptic number.

It is an amenable number.

205481138384 is an abundant number, since it is smaller than the sum of its proper divisors (206366833876).

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

205481138384 is a wasteful number, since it uses less digits than its factorization.

205481138384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442847318 (or 442847312 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 47.

The spelling of 205481138384 in words is "two hundred five billion, four hundred eighty-one million, one hundred thirty-eight thousand, three hundred eighty-four".