2112645617 has 2 divisors, whose sum is σ = 2112645618. Its totient is φ = 2112645616.

The previous prime is 2112645589. The next prime is 2112645631. The reversal of 2112645617 is 7165462112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1104964081 + 1007681536 = 33241^2 + 31744^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112645617 - 2⁶ = 2112645553 is a prime.

It is not a weakly prime, because it can be changed into another prime (2112645217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056322808 + 1056322809.

It is an arithmetic number, because the mean of its divisors is an integer number (1056322809).

Almost surely, 2^2112645617 is an apocalyptic number.

It is an amenable number.

2112645617 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112645617 is an equidigital number, since it uses as much as digits as its factorization.

2112645617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 2112645617 is about 45963.5248539535. The cubic root of 2112645617 is about 1283.1444534450.

The spelling of 2112645617 in words is "two billion, one hundred twelve million, six hundred forty-five thousand, six hundred seventeen".