205969343642 has 16 divisors (see below), whose sum is σ = 324739996992. Its totient is φ = 97788044640.

The previous prime is 205969343623. The next prime is 205969343681. The reversal of 205969343642 is 246343969502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16335284 + ... + 16347887.

It is an arithmetic number, because the mean of its divisors is an integer number (20296249812).

Almost surely, 2^205969343642 is an apocalyptic number.

205969343642 is a deficient number, since it is larger than the sum of its proper divisors (118770653350).

205969343642 is a wasteful number, since it uses less digits than its factorization.

205969343642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32683333.

The product of its (nonzero) digits is 8398080, while the sum is 53.

The spelling of 205969343642 in words is "two hundred five billion, nine hundred sixty-nine million, three hundred forty-three thousand, six hundred forty-two".