165220501622087 has 2 divisors, whose sum is σ = 165220501622088. Its totient is φ = 165220501622086.

The previous prime is 165220501622003. The next prime is 165220501622089. The reversal of 165220501622087 is 780226105022561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165220501622087 - 2¹⁴ = 165220501605703 is a prime.

Together with 165220501622089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165220501622089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82610250811043 + 82610250811044.

It is an arithmetic number, because the mean of its divisors is an integer number (82610250811044).

Almost surely, 2^{165220501622087} is an apocalyptic number.

165220501622087 is a deficient number, since it is larger than the sum of its proper divisors (1).

165220501622087 is an equidigital number, since it uses as much as digits as its factorization.

165220501622087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 165220501622087 in words is "one hundred sixty-five trillion, two hundred twenty billion, five hundred one million, six hundred twenty-two thousand, eighty-seven".