2659535440 has 20 divisors (see below), whose sum is σ = 6183420084. Its totient is φ = 1063814144.

The previous prime is 2659535387. The next prime is 2659535533. The reversal of 2659535440 is 445359562.

It can be written as a sum of positive squares in 2 ways, for example, as 1926858816 + 732676624 = 43896^2 + 27068^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16622017 + ... + 16622176.

Almost surely, 2^2659535440 is an apocalyptic number.

2659535440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2659535440 is an abundant number, since it is smaller than the sum of its proper divisors (3523884644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2659535440 is a wasteful number, since it uses less digits than its factorization.

2659535440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33244206 (or 33244200 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 43.

The square root of 2659535440 is about 51570.6839202274. The cubic root of 2659535440 is about 1385.4853160694.

The spelling of 2659535440 in words is "two billion, six hundred fifty-nine million, five hundred thirty-five thousand, four hundred forty".