645455022167 has 2 divisors, whose sum is σ = 645455022168. Its totient is φ = 645455022166.

The previous prime is 645455022103. The next prime is 645455022169. The reversal of 645455022167 is 761220554546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645455022167 - 2⁶ = 645455022103 is a prime.

It is a super-2 number, since 2×645455022167² (a number of 24 digits) contains 22 as substring.

Together with 645455022169, 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 (645455022169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322727511083 + 322727511084.

It is an arithmetic number, because the mean of its divisors is an integer number (322727511084).

Almost surely, 2^645455022167 is an apocalyptic number.

645455022167 is a deficient number, since it is larger than the sum of its proper divisors (1).

645455022167 is an equidigital number, since it uses as much as digits as its factorization.

645455022167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016000, while the sum is 47.

The spelling of 645455022167 in words is "six hundred forty-five billion, four hundred fifty-five million, twenty-two thousand, one hundred sixty-seven".