172543445870 has 16 divisors (see below), whose sum is σ = 313023702528. Its totient is φ = 68473933920.

The previous prime is 172543445857. The next prime is 172543445881. The reversal of 172543445870 is 78544345271.

It is a congruent number.

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, 67929221 + ... + 67931760.

It is an arithmetic number, because the mean of its divisors is an integer number (19563981408).

Almost surely, 2^172543445870 is an apocalyptic number.

172543445870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172543445870 is a deficient number, since it is larger than the sum of its proper divisors (140480256658).

172543445870 is a wasteful number, since it uses less digits than its factorization.

172543445870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135861115.

The product of its (nonzero) digits is 3763200, while the sum is 50.

The spelling of 172543445870 in words is "one hundred seventy-two billion, five hundred forty-three million, four hundred forty-five thousand, eight hundred seventy".