2116611423225 has 84 divisors (see below), whose sum is σ = 4237797363436. Its totient is φ = 1042023968640.

The previous prime is 2116611423211. The next prime is 2116611423271. The reversal of 2116611423225 is 5223241166112.

2116611423225 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 6 + 1 + 1 + 423 + 225 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 524222337024 + 1592389086201 = 724032^2 + 1261899^2 .

It is not a de Polignac number, because 2116611423225 - 2¹⁰ = 2116611422201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2116611423225.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 4229914 + ... + 4703763.

Almost surely, 2^{2116611423225} is an apocalyptic number.

2116611423225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2116611423225 is an abundant number, since it is smaller than the sum of its proper divisors (2121185940211).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2116611423225 is an equidigital number, since it uses as much as digits as its factorization.

2116611423225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8933718 (or 8933698 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

Adding to 2116611423225 its reverse (5223241166112), we get a palindrome (7339852589337).

The spelling of 2116611423225 in words is "two trillion, one hundred sixteen billion, six hundred eleven million, four hundred twenty-three thousand, two hundred twenty-five".