645570119 has 2 divisors, whose sum is σ = 645570120. Its totient is φ = 645570118.

The previous prime is 645570091. The next prime is 645570161. The reversal of 645570119 is 911075546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645570119 - 2¹⁶ = 645504583 is a prime.

It is a super-2 number, since 2×645570119² = 833521557091348322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645570179) 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, 322785059 + 322785060.

It is an arithmetic number, because the mean of its divisors is an integer number (322785060).

Almost surely, 2^645570119 is an apocalyptic number.

645570119 is a deficient number, since it is larger than the sum of its proper divisors (1).

645570119 is an equidigital number, since it uses as much as digits as its factorization.

645570119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 645570119 is about 25408.0719260632. The cubic root of 645570119 is about 864.2667531781.

The spelling of 645570119 in words is "six hundred forty-five million, five hundred seventy thousand, one hundred nineteen".