172824373261 has 2 divisors, whose sum is σ = 172824373262. Its totient is φ = 172824373260.

The previous prime is 172824373247. The next prime is 172824373277. The reversal of 172824373261 is 162373428271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147163537161 + 25660836100 = 383619^2 + 160190^2 .

It is a cyclic number.

It is not a de Polignac number, because 172824373261 - 2⁵ = 172824373229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172824373201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86412186630 + 86412186631.

It is an arithmetic number, because the mean of its divisors is an integer number (86412186631).

Almost surely, 2^172824373261 is an apocalyptic number.

It is an amenable number.

172824373261 is a deficient number, since it is larger than the sum of its proper divisors (1).

172824373261 is an equidigital number, since it uses as much as digits as its factorization.

172824373261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 46.

The spelling of 172824373261 in words is "one hundred seventy-two billion, eight hundred twenty-four million, three hundred seventy-three thousand, two hundred sixty-one".