172838644042 has 16 divisors (see below), whose sum is σ = 270824492160. Its totient is φ = 82571992272.

The previous prime is 172838644021. The next prime is 172838644057. The reversal of 172838644042 is 240446838271.

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, 2001993 + ... + 2086540.

It is an arithmetic number, because the mean of its divisors is an integer number (16926530760).

Almost surely, 2^172838644042 is an apocalyptic number.

172838644042 is a deficient number, since it is larger than the sum of its proper divisors (97985848118).

172838644042 is a wasteful number, since it uses less digits than its factorization.

172838644042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4089477.

The product of its (nonzero) digits is 2064384, while the sum is 49.

The spelling of 172838644042 in words is "one hundred seventy-two billion, eight hundred thirty-eight million, six hundred forty-four thousand, forty-two".