2516661605 has 16 divisors (see below), whose sum is σ = 3064703040. Its totient is φ = 1983708672.

The previous prime is 2516661601. The next prime is 2516661611. The reversal of 2516661605 is 5061666152.

It is a cyclic number.

It is not a de Polignac number, because 2516661605 - 2² = 2516661601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2516661601) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 98666 + ... + 121524.

It is an arithmetic number, because the mean of its divisors is an integer number (191543940).

Almost surely, 2^2516661605 is an apocalyptic number.

It is an amenable number.

2516661605 is a deficient number, since it is larger than the sum of its proper divisors (548041435).

2516661605 is a wasteful number, since it uses less digits than its factorization.

2516661605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23188.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 2516661605 is about 50166.3393621659. The cubic root of 2516661605 is about 1360.2172384019.

The spelling of 2516661605 in words is "two billion, five hundred sixteen million, six hundred sixty-one thousand, six hundred five".