205491893532 has 12 divisors (see below), whose sum is σ = 479481084936. Its totient is φ = 68497297840.

The previous prime is 205491893489. The next prime is 205491893533. The reversal of 205491893532 is 235398194502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205491893533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8562162219 + ... + 8562162242.

It is an arithmetic number, because the mean of its divisors is an integer number (39956757078).

Almost surely, 2^205491893532 is an apocalyptic number.

It is an amenable number.

205491893532 is an abundant number, since it is smaller than the sum of its proper divisors (273989191404).

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

205491893532 is a wasteful number, since it uses less digits than its factorization.

205491893532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17124324468 (or 17124324466 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 51.

The spelling of 205491893532 in words is "two hundred five billion, four hundred ninety-one million, eight hundred ninety-three thousand, five hundred thirty-two".