205597535142 has 32 divisors (see below), whose sum is σ = 412596737280. Its totient is φ = 68298986720.

The previous prime is 205597535089. The next prime is 205597535147. The reversal of 205597535142 is 241535795502.

It is a junction number, because it is equal to n+sod(n) for n = 205597535091 and 205597535100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205597535147) by changing a digit.

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, 16842013 + ... + 16854215.

It is an arithmetic number, because the mean of its divisors is an integer number (12893648040).

Almost surely, 2^205597535142 is an apocalyptic number.

205597535142 is an abundant number, since it is smaller than the sum of its proper divisors (206999202138).

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

205597535142 is a wasteful number, since it uses less digits than its factorization.

205597535142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21548.

The product of its (nonzero) digits is 1890000, while the sum is 48.

The spelling of 205597535142 in words is "two hundred five billion, five hundred ninety-seven million, five hundred thirty-five thousand, one hundred forty-two".