172523744849 has 4 divisors (see below), whose sum is σ = 173074939236. Its totient is φ = 171972550464.

The previous prime is 172523744837. The next prime is 172523744867. The reversal of 172523744849 is 948447325271.

172523744849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 68569088449 + 103954656400 = 261857^2 + 322420^2 .

It is a cyclic number.

It is not a de Polignac number, because 172523744849 - 2¹⁶ = 172523679313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172523744794 and 172523744803.

It is not an unprimeable number, because it can be changed into a prime (172523044849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275596724 + ... + 275597349.

It is an arithmetic number, because the mean of its divisors is an integer number (43268734809).

Almost surely, 2^172523744849 is an apocalyptic number.

It is an amenable number.

172523744849 is a deficient number, since it is larger than the sum of its proper divisors (551194387).

172523744849 is an equidigital number, since it uses as much as digits as its factorization.

172523744849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551194386.

The product of its digits is 13547520, while the sum is 56.

The spelling of 172523744849 in words is "one hundred seventy-two billion, five hundred twenty-three million, seven hundred forty-four thousand, eight hundred forty-nine".