2516620651 has 4 divisors (see below), whose sum is σ = 2527421832. Its totient is φ = 2505819472.

The previous prime is 2516620597. The next prime is 2516620747. The reversal of 2516620651 is 1560266152.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2516620651 - 2⁷ = 2516620523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2516621651) 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 3 ways as a sum of consecutive naturals, for example, 5400241 + ... + 5400706.

It is an arithmetic number, because the mean of its divisors is an integer number (631855458).

Almost surely, 2^2516620651 is an apocalyptic number.

2516620651 is a deficient number, since it is larger than the sum of its proper divisors (10801181).

2516620651 is a wasteful number, since it uses less digits than its factorization.

2516620651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10801180.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 2516620651 is about 50165.9311784402. The cubic root of 2516620651 is about 1360.2098600242.

The spelling of 2516620651 in words is "two billion, five hundred sixteen million, six hundred twenty thousand, six hundred fifty-one".