2651556065 has 8 divisors (see below), whose sum is σ = 3186599208. Its totient is φ = 2118090240.

The previous prime is 2651556029. The next prime is 2651556071. The reversal of 2651556065 is 5606551562.

It can be written as a sum of positive squares in 4 ways, for example, as 411237841 + 2240318224 = 20279^2 + 47332^2 .

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

It is not a de Polignac number, because 2651556065 - 2¹⁰ = 2651555041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390626 + ... + 397355.

It is an arithmetic number, because the mean of its divisors is an integer number (398324901).

Almost surely, 2^2651556065 is an apocalyptic number.

It is an amenable number.

2651556065 is a deficient number, since it is larger than the sum of its proper divisors (535043143).

2651556065 is an equidigital number, since it uses as much as digits as its factorization.

2651556065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788659.

The product of its (nonzero) digits is 270000, while the sum is 41.

The square root of 2651556065 is about 51493.2623262500. The cubic root of 2651556065 is about 1384.0983092053.

The spelling of 2651556065 in words is "two billion, six hundred fifty-one million, five hundred fifty-six thousand, sixty-five".