172180029842 has 18 divisors (see below), whose sum is σ = 270008565813. Its totient is φ = 82340515752.

The previous prime is 172180029787. The next prime is 172180029893. The reversal of 172180029842 is 248920081271.

It can be written as a sum of positive squares in 2 ways, for example, as 171072404881 + 1107624961 = 413609^2 + 33281^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=293411.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172180029793 and 172180029802.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13490528 + ... + 13503284.

Almost surely, 2^172180029842 is an apocalyptic number.

172180029842 is a deficient number, since it is larger than the sum of its proper divisors (97828535971).

172180029842 is an frugal number, since it uses more digits than its factorization.

172180029842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25562 (or 12782 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The spelling of 172180029842 in words is "one hundred seventy-two billion, one hundred eighty million, twenty-nine thousand, eight hundred forty-two".