2159019649 has 2 divisors, whose sum is σ = 2159019650. Its totient is φ = 2159019648.

The previous prime is 2159019623. The next prime is 2159019661. The reversal of 2159019649 is 9469109512.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2067339024 + 91680625 = 45468^2 + 9575^2 .

It is a cyclic number.

It is not a de Polignac number, because 2159019649 - 2¹⁵ = 2158986881 is a prime.

It is a super-2 number, since 2×2159019649² = 9322731689536166402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2159019599 and 2159019608.

It is not a weakly prime, because it can be changed into another prime (2159010649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079509824 + 1079509825.

It is an arithmetic number, because the mean of its divisors is an integer number (1079509825).

Almost surely, 2^2159019649 is an apocalyptic number.

It is an amenable number.

2159019649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2159019649 is an equidigital number, since it uses as much as digits as its factorization.

2159019649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 2159019649 is about 46465.2520600072. The cubic root of 2159019649 is about 1292.4652194061.

The spelling of 2159019649 in words is "two billion, one hundred fifty-nine million, nineteen thousand, six hundred forty-nine".