172042448453 has 2 divisors, whose sum is σ = 172042448454. Its totient is φ = 172042448452.

The previous prime is 172042448377. The next prime is 172042448497. The reversal of 172042448453 is 354844240271.

It is an a-pointer prime, because the next prime (172042448497) can be obtained adding 172042448453 to its sum of digits (44).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154745464129 + 17296984324 = 393377^2 + 131518^2 .

It is a cyclic number.

It is not a de Polignac number, because 172042448453 - 2¹⁰ = 172042447429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172042445453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86021224226 + 86021224227.

It is an arithmetic number, because the mean of its divisors is an integer number (86021224227).

Almost surely, 2^172042448453 is an apocalyptic number.

It is an amenable number.

172042448453 is a deficient number, since it is larger than the sum of its proper divisors (1).

172042448453 is an equidigital number, since it uses as much as digits as its factorization.

172042448453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 860160, while the sum is 44.

The spelling of 172042448453 in words is "one hundred seventy-two billion, forty-two million, four hundred forty-eight thousand, four hundred fifty-three".