172760726209 has 16 divisors (see below), whose sum is σ = 183374467920. Its totient is φ = 162470640640.

The previous prime is 172760726161. The next prime is 172760726231. The reversal of 172760726209 is 902627067271.

It is a happy number.

172760726209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 96750236209 + 76010490000 = 311047^2 + 275700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172760726209 is a prime.

It is a super-2 number, since 2×172760726209² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172760729209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 615867 + ... + 851359.

It is an arithmetic number, because the mean of its divisors is an integer number (11460904245).

Almost surely, 2^172760726209 is an apocalyptic number.

It is an amenable number.

172760726209 is a deficient number, since it is larger than the sum of its proper divisors (10613741711).

172760726209 is a wasteful number, since it uses less digits than its factorization.

172760726209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236180.

The product of its (nonzero) digits is 889056, while the sum is 49.

The spelling of 172760726209 in words is "one hundred seventy-two billion, seven hundred sixty million, seven hundred twenty-six thousand, two hundred nine".