2516943645 has 16 divisors (see below), whose sum is σ = 4474566720. Its totient is φ = 1342369872.

The previous prime is 2516943643. The next prime is 2516943647. The reversal of 2516943645 is 5463496152.

2516943645 is a `hidden beast` number, since 2 + 516 + 94 + 3 + 6 + 45 = 666.

It is an interprime number because it is at equal distance from previous prime (2516943643) and next prime (2516943647).

It is not a de Polignac number, because 2516943645 - 2¹ = 2516943643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2516943645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2516943643) 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, 9321879 + ... + 9322148.

It is an arithmetic number, because the mean of its divisors is an integer number (279660420).

Almost surely, 2^2516943645 is an apocalyptic number.

It is an amenable number.

2516943645 is a deficient number, since it is larger than the sum of its proper divisors (1957623075).

2516943645 is a wasteful number, since it uses less digits than its factorization.

2516943645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18644041 (or 18644035 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 2516943645 is about 50169.1503316530. The cubic root of 2516943645 is about 1360.2680492775.

The spelling of 2516943645 in words is "two billion, five hundred sixteen million, nine hundred forty-three thousand, six hundred forty-five".