172005518542 has 16 divisors (see below), whose sum is σ = 303114620592. Its totient is φ = 72170147520.

The previous prime is 172005518537. The next prime is 172005518549. The reversal of 172005518542 is 245815500271.

172005518542 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 172005518495 and 172005518504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172005518549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300708663 + ... + 300709234.

It is an arithmetic number, because the mean of its divisors is an integer number (18944663787).

Almost surely, 2^172005518542 is an apocalyptic number.

172005518542 is a deficient number, since it is larger than the sum of its proper divisors (131109102050).

172005518542 is a wasteful number, since it uses less digits than its factorization.

172005518542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601417923.

The product of its (nonzero) digits is 112000, while the sum is 40.

The spelling of 172005518542 in words is "one hundred seventy-two billion, five million, five hundred eighteen thousand, five hundred forty-two".