172028554667 has 2 divisors, whose sum is σ = 172028554668. Its totient is φ = 172028554666.

The previous prime is 172028554661. The next prime is 172028554669. The reversal of 172028554667 is 766455820271.

It is a strong prime.

It is an emirp because it is prime and its reverse (766455820271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172028554667 - 2¹⁰ = 172028553643 is a prime.

Together with 172028554669, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172028554661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86014277333 + 86014277334.

It is an arithmetic number, because the mean of its divisors is an integer number (86014277334).

Almost surely, 2^172028554667 is an apocalyptic number.

172028554667 is a deficient number, since it is larger than the sum of its proper divisors (1).

172028554667 is an equidigital number, since it uses as much as digits as its factorization.

172028554667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 172028554667 in words is "one hundred seventy-two billion, twenty-eight million, five hundred fifty-four thousand, six hundred sixty-seven".