5261659561 has 8 divisors (see below), whose sum is σ = 5547032064. Its totient is φ = 4981004160.

The previous prime is 5261659547. The next prime is 5261659577. The reversal of 5261659561 is 1659561625.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5261659561 - 2⁷ = 5261659433 is a prime.

It is a super-2 number, since 2×5261659561² = 55370122671725425442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5261659061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1176985 + ... + 1181446.

It is an arithmetic number, because the mean of its divisors is an integer number (693379008).

Almost surely, 2^5261659561 is an apocalyptic number.

It is an amenable number.

5261659561 is a deficient number, since it is larger than the sum of its proper divisors (285372503).

5261659561 is a wasteful number, since it uses less digits than its factorization.

5261659561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358551.

The product of its digits is 486000, while the sum is 46.

The square root of 5261659561 is about 72537.2977233092. The cubic root of 5261659561 is about 1739.2990043007.

The spelling of 5261659561 in words is "five billion, two hundred sixty-one million, six hundred fifty-nine thousand, five hundred sixty-one".