172042448401 has 4 divisors (see below), whose sum is σ = 172045142500. Its totient is φ = 172039754304.

The previous prime is 172042448377. The next prime is 172042448453. The reversal of 172042448401 is 104844240271.

It is a Cunningham number, because it is equal to 414780²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104844240271 = 19 ⋅5518117909.

It can be written as a sum of positive squares in 2 ways, for example, as 111328995600 + 60713452801 = 333660^2 + 246401^2 .

It is a cyclic number.

It is not a de Polignac number, because 172042448401 - 2⁷ = 172042448273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172042448101) 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, 1248876 + ... + 1379773.

It is an arithmetic number, because the mean of its divisors is an integer number (43011285625).

Almost surely, 2^172042448401 is an apocalyptic number.

It is an amenable number.

172042448401 is a deficient number, since it is larger than the sum of its proper divisors (2694099).

172042448401 is an equidigital number, since it uses as much as digits as its factorization.

172042448401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694098.

The product of its (nonzero) digits is 57344, while the sum is 37.

Adding to 172042448401 its reverse (104844240271), we get a palindrome (276886688672).

The spelling of 172042448401 in words is "one hundred seventy-two billion, forty-two million, four hundred forty-eight thousand, four hundred one".