172133362412261 has 4 divisors (see below), whose sum is σ = 174955220812524. Its totient is φ = 169311504012000.

The previous prime is 172133362412239. The next prime is 172133362412273. The reversal of 172133362412261 is 162214263331271.

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 37015846924225 + 135117515488036 = 6084065^2 + 11624006^2 .

It is a cyclic number.

It is not a de Polignac number, because 172133362412261 - 2⁶ = 172133362412197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172133362412161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1410929200040 + ... + 1410929200161.

It is an arithmetic number, because the mean of its divisors is an integer number (43738805203131).

Almost surely, 2^{172133362412261} is an apocalyptic number.

It is an amenable number.

172133362412261 is a deficient number, since it is larger than the sum of its proper divisors (2821858400263).

172133362412261 is an equidigital number, since it uses as much as digits as its factorization.

172133362412261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821858400262.

The product of its digits is 435456, while the sum is 44.

The spelling of 172133362412261 in words is "one hundred seventy-two trillion, one hundred thirty-three billion, three hundred sixty-two million, four hundred twelve thousand, two hundred sixty-one".