205142142542 has 8 divisors (see below), whose sum is σ = 308584923696. Its totient is φ = 102280501312.

The previous prime is 205142142529. The next prime is 205142142599. The reversal of 205142142542 is 245241241502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 205142142499 and 205142142508.

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, 145284098 + ... + 145285509.

It is an arithmetic number, because the mean of its divisors is an integer number (38573115462).

Almost surely, 2^205142142542 is an apocalyptic number.

205142142542 is a deficient number, since it is larger than the sum of its proper divisors (103442781154).

205142142542 is a wasteful number, since it uses less digits than its factorization.

205142142542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290569962.

The product of its (nonzero) digits is 25600, while the sum is 32.

The spelling of 205142142542 in words is "two hundred five billion, one hundred forty-two million, one hundred forty-two thousand, five hundred forty-two".