259808983661 has 4 divisors (see below), whose sum is σ = 260974046592. Its totient is φ = 258643920732.

The previous prime is 259808983591. The next prime is 259808983769. The reversal of 259808983661 is 166389808952.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 259808983661 - 2²² = 259804789357 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 (259808985661) 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, 582531131 + ... + 582531576.

It is an arithmetic number, because the mean of its divisors is an integer number (65243511648).

Almost surely, 2^259808983661 is an apocalyptic number.

It is an amenable number.

259808983661 is a deficient number, since it is larger than the sum of its proper divisors (1165062931).

259808983661 is a wasteful number, since it uses less digits than its factorization.

259808983661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165062930.

The product of its (nonzero) digits is 44789760, while the sum is 65.

The spelling of 259808983661 in words is "two hundred fifty-nine billion, eight hundred eight million, nine hundred eighty-three thousand, six hundred sixty-one".