149773722173 has 4 divisors (see below), whose sum is σ = 149776343520. Its totient is φ = 149771100828.

The previous prime is 149773722157. The next prime is 149773722193. The reversal of 149773722173 is 371227377941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 149773722173 - 2⁴ = 149773722157 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 (149773722193) 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, 1223015 + ... + 1339892.

It is an arithmetic number, because the mean of its divisors is an integer number (37444085880).

Almost surely, 2^149773722173 is an apocalyptic number.

It is an amenable number.

149773722173 is a deficient number, since it is larger than the sum of its proper divisors (2621347).

149773722173 is an equidigital number, since it uses as much as digits as its factorization.

149773722173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621346.

The product of its digits is 3111696, while the sum is 53.

The spelling of 149773722173 in words is "one hundred forty-nine billion, seven hundred seventy-three million, seven hundred twenty-two thousand, one hundred seventy-three".