172627868513 has 4 divisors (see below), whose sum is σ = 172628817300. Its totient is φ = 172626919728.

The previous prime is 172627868447. The next prime is 172627868519. The reversal of 172627868513 is 315868726271.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 315868726271 = 7 ⋅45124103753.

It can be written as a sum of positive squares in 2 ways, for example, as 151654167184 + 20973701329 = 389428^2 + 144823^2 .

It is a cyclic number.

It is not a de Polignac number, because 172627868513 - 2¹² = 172627864417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172627868519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106238 + ... + 597111.

It is an arithmetic number, because the mean of its divisors is an integer number (43157204325).

Almost surely, 2^172627868513 is an apocalyptic number.

It is an amenable number.

172627868513 is a deficient number, since it is larger than the sum of its proper divisors (948787).

172627868513 is an equidigital number, since it uses as much as digits as its factorization.

172627868513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948786.

The product of its digits is 6773760, while the sum is 56.

The spelling of 172627868513 in words is "one hundred seventy-two billion, six hundred twenty-seven million, eight hundred sixty-eight thousand, five hundred thirteen".