2116563825 has 24 divisors (see below), whose sum is σ = 3547331488. Its totient is φ = 1113367680.

The previous prime is 2116563821. The next prime is 2116563833. The reversal of 2116563825 is 5283656112.

It is not a de Polignac number, because 2116563825 - 2² = 2116563821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2116563821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187819 + ... + 198768.

Almost surely, 2^2116563825 is an apocalyptic number.

2116563825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2116563825 is a deficient number, since it is larger than the sum of its proper divisors (1430767663).

2116563825 is a wasteful number, since it uses less digits than its factorization.

2116563825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386673 (or 386668 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 2116563825 is about 46006.1281244140. The cubic root of 2116563825 is about 1283.9372227680.

The spelling of 2116563825 in words is "two billion, one hundred sixteen million, five hundred sixty-three thousand, eight hundred twenty-five".