2613873665 has 8 divisors (see below), whose sum is σ = 3377929128. Its totient is φ = 1930245120.

The previous prime is 2613873653. The next prime is 2613873677. The reversal of 2613873665 is 5663783162.

It is an interprime number because it is at equal distance from previous prime (2613873653) and next prime (2613873677).

It can be written as a sum of positive squares in 4 ways, for example, as 85895824 + 2527977841 = 9268^2 + 50279^2 .

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

It is not a de Polignac number, because 2613873665 - 2⁴ = 2613873649 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20106656 + ... + 20106785.

It is an arithmetic number, because the mean of its divisors is an integer number (422241141).

Almost surely, 2^2613873665 is an apocalyptic number.

It is an amenable number.

2613873665 is a deficient number, since it is larger than the sum of its proper divisors (764055463).

2613873665 is a wasteful number, since it uses less digits than its factorization.

2613873665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40213459.

The product of its digits is 1088640, while the sum is 47.

The square root of 2613873665 is about 51126.0566149982. The cubic root of 2613873665 is about 1377.5103302574.

The spelling of 2613873665 in words is "two billion, six hundred thirteen million, eight hundred seventy-three thousand, six hundred sixty-five".