172474868161 has 4 divisors (see below), whose sum is σ = 172486786500. Its totient is φ = 172462949824.

The previous prime is 172474868147. The next prime is 172474868191. The reversal of 172474868161 is 161868474271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26679955600 + 145794912561 = 163340^2 + 381831^2 .

It is a cyclic number.

It is not a de Polignac number, because 172474868161 - 2³⁵ = 138115129793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172474868101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5937436 + ... + 5966413.

It is an arithmetic number, because the mean of its divisors is an integer number (43121696625).

Almost surely, 2^172474868161 is an apocalyptic number.

It is an amenable number.

172474868161 is a deficient number, since it is larger than the sum of its proper divisors (11918339).

172474868161 is a wasteful number, since it uses less digits than its factorization.

172474868161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11918338.

The product of its digits is 3612672, while the sum is 55.

The spelling of 172474868161 in words is "one hundred seventy-two billion, four hundred seventy-four million, eight hundred sixty-eight thousand, one hundred sixty-one".