2801613665 has 4 divisors (see below), whose sum is σ = 3361936404. Its totient is φ = 2241290928.

The previous prime is 2801613641. The next prime is 2801613713. The reversal of 2801613665 is 5663161082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5663161082 = 2 ⋅2831580541.

It can be written as a sum of positive squares in 2 ways, for example, as 2076442624 + 725171041 = 45568^2 + 26929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2801613665 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280161362 + ... + 280161371.

It is an arithmetic number, because the mean of its divisors is an integer number (840484101).

Almost surely, 2^2801613665 is an apocalyptic number.

It is an amenable number.

2801613665 is a deficient number, since it is larger than the sum of its proper divisors (560322739).

2801613665 is an equidigital number, since it uses as much as digits as its factorization.

2801613665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560322738.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 2801613665 is about 52930.2717261115. The cubic root of 2801613665 is about 1409.7304558277.

The spelling of 2801613665 in words is "two billion, eight hundred one million, six hundred thirteen thousand, six hundred sixty-five".