259601779091 has 4 divisors (see below), whose sum is σ = 259602983592. Its totient is φ = 259600574592.

The previous prime is 259601779039. The next prime is 259601779121. The reversal of 259601779091 is 190977106952.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 259601779091 - 2¹⁸ = 259601516947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (259601775091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180521 + ... + 742826.

It is an arithmetic number, because the mean of its divisors is an integer number (64900745898).

Almost surely, 2^259601779091 is an apocalyptic number.

259601779091 is a deficient number, since it is larger than the sum of its proper divisors (1204501).

259601779091 is an equidigital number, since it uses as much as digits as its factorization.

259601779091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204500.

The product of its (nonzero) digits is 2143260, while the sum is 56.

The spelling of 259601779091 in words is "two hundred fifty-nine billion, six hundred one million, seven hundred seventy-nine thousand, ninety-one".