172105250149 has 16 divisors (see below), whose sum is σ = 205815306240. Its totient is φ = 140711828400.

The previous prime is 172105250137. The next prime is 172105250179. The reversal of 172105250149 is 941052501271.

It is a cyclic number.

It is not a de Polignac number, because 172105250149 - 2⁹ = 172105249637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172105250179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1431027 + ... + 1546624.

It is an arithmetic number, because the mean of its divisors is an integer number (12863456640).

Almost surely, 2^172105250149 is an apocalyptic number.

It is an amenable number.

172105250149 is a deficient number, since it is larger than the sum of its proper divisors (33710056091).

172105250149 is a wasteful number, since it uses less digits than its factorization.

172105250149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2978040.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 172105250149 in words is "one hundred seventy-two billion, one hundred five million, two hundred fifty thousand, one hundred forty-nine".