259294898821 has 6 divisors (see below), whose sum is σ = 301628759910. Its totient is φ = 222252770376.

The previous prime is 259294898789. The next prime is 259294898831. The reversal of 259294898821 is 128898492952.

It can be written as a sum of positive squares in only one way, i.e., 180510268225 + 78784630596 = 424865^2 + 280686^2 .

It is not a de Polignac number, because 259294898821 - 2⁵ = 259294898789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259294898831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2645866266 + ... + 2645866363.

It is an arithmetic number, because the mean of its divisors is an integer number (50271459985).

Almost surely, 2^259294898821 is an apocalyptic number.

It is an amenable number.

259294898821 is a deficient number, since it is larger than the sum of its proper divisors (42333861089).

259294898821 is an equidigital number, since it uses as much as digits as its factorization.

259294898821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5291732643 (or 5291732636 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 67.

The spelling of 259294898821 in words is "two hundred fifty-nine billion, two hundred ninety-four million, eight hundred ninety-eight thousand, eight hundred twenty-one".