645851119 has 2 divisors, whose sum is σ = 645851120. Its totient is φ = 645851118.

The previous prime is 645851033. The next prime is 645851183. The reversal of 645851119 is 911158546.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-645851119 is a prime.

It is a super-2 number, since 2×645851119² = 834247335827104322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645821119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322925559 + 322925560.

It is an arithmetic number, because the mean of its divisors is an integer number (322925560).

Almost surely, 2^645851119 is an apocalyptic number.

645851119 is a deficient number, since it is larger than the sum of its proper divisors (1).

645851119 is an equidigital number, since it uses as much as digits as its factorization.

645851119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 40.

The square root of 645851119 is about 25413.6010632102. The cubic root of 645851119 is about 864.3921326540.

The spelling of 645851119 in words is "six hundred forty-five million, eight hundred fifty-one thousand, one hundred nineteen".