645088159 has 2 divisors, whose sum is σ = 645088160. Its totient is φ = 645088158.

The previous prime is 645088139. The next prime is 645088181. The reversal of 645088159 is 951880546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645088159 - 2²¹ = 642991007 is a prime.

It is a super-2 number, since 2×645088159² = 832277465764018562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645088139) 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 as a sum of consecutive naturals, namely, 322544079 + 322544080.

It is an arithmetic number, because the mean of its divisors is an integer number (322544080).

Almost surely, 2^645088159 is an apocalyptic number.

645088159 is a deficient number, since it is larger than the sum of its proper divisors (1).

645088159 is an equidigital number, since it uses as much as digits as its factorization.

645088159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 46.

The square root of 645088159 is about 25398.5857677155. The cubic root of 645088159 is about 864.0516225550.

The spelling of 645088159 in words is "six hundred forty-five million, eighty-eight thousand, one hundred fifty-nine".