171744600149 has 2 divisors, whose sum is σ = 171744600150. Its totient is φ = 171744600148.

The previous prime is 171744600143. The next prime is 171744600229. The reversal of 171744600149 is 941006447171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136691399524 + 35053200625 = 369718^2 + 187225^2 .

It is a cyclic number.

It is not a de Polignac number, because 171744600149 - 2³² = 167449632853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171744600143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85872300074 + 85872300075.

It is an arithmetic number, because the mean of its divisors is an integer number (85872300075).

Almost surely, 2^171744600149 is an apocalyptic number.

It is an amenable number.

171744600149 is a deficient number, since it is larger than the sum of its proper divisors (1).

171744600149 is an equidigital number, since it uses as much as digits as its factorization.

171744600149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 171744600149 in words is "one hundred seventy-one billion, seven hundred forty-four million, six hundred thousand, one hundred forty-nine".