259645663619 has 2 divisors, whose sum is σ = 259645663620. Its totient is φ = 259645663618.

The previous prime is 259645663591. The next prime is 259645663637. The reversal of 259645663619 is 916366546952.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 259645663619 - 2¹² = 259645659523 is a prime.

It is a super-2 number, since 2×259645663619² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (259645663919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129822831809 + 129822831810.

It is an arithmetic number, because the mean of its divisors is an integer number (129822831810).

Almost surely, 2^259645663619 is an apocalyptic number.

259645663619 is a deficient number, since it is larger than the sum of its proper divisors (1).

259645663619 is an equidigital number, since it uses as much as digits as its factorization.

259645663619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62985600, while the sum is 62.

The spelling of 259645663619 in words is "two hundred fifty-nine billion, six hundred forty-five million, six hundred sixty-three thousand, six hundred nineteen".