172276867481 has 2 divisors, whose sum is σ = 172276867482. Its totient is φ = 172276867480.

The previous prime is 172276867417. The next prime is 172276867489. The reversal of 172276867481 is 184768672271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157914043456 + 14362824025 = 397384^2 + 119845^2 .

It is an emirp because it is prime and its reverse (184768672271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172276867481 - 2⁶ = 172276867417 is a prime.

It is a super-2 number, since 2×172276867481² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 172276867481.

It is not a weakly prime, because it can be changed into another prime (172276867489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86138433740 + 86138433741.

It is an arithmetic number, because the mean of its divisors is an integer number (86138433741).

Almost surely, 2^172276867481 is an apocalyptic number.

It is an amenable number.

172276867481 is a deficient number, since it is larger than the sum of its proper divisors (1).

172276867481 is an equidigital number, since it uses as much as digits as its factorization.

172276867481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12644352, while the sum is 59.

The spelling of 172276867481 in words is "one hundred seventy-two billion, two hundred seventy-six million, eight hundred sixty-seven thousand, four hundred eighty-one".