2613873649 has 2 divisors, whose sum is σ = 2613873650. Its totient is φ = 2613873648.

The previous prime is 2613873631. The next prime is 2613873653. The reversal of 2613873649 is 9463783162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2602530225 + 11343424 = 51015^2 + 3368^2 .

It is a cyclic number.

It is not a de Polignac number, because 2613873649 - 2⁹ = 2613873137 is a prime.

It is not a weakly prime, because it can be changed into another prime (2613873679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1306936824 + 1306936825.

It is an arithmetic number, because the mean of its divisors is an integer number (1306936825).

Almost surely, 2^2613873649 is an apocalyptic number.

It is an amenable number.

2613873649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2613873649 is an equidigital number, since it uses as much as digits as its factorization.

2613873649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 49.

The square root of 2613873649 is about 51126.0564585222. The cubic root of 2613873649 is about 1377.5103274467.

The spelling of 2613873649 in words is "two billion, six hundred thirteen million, eight hundred seventy-three thousand, six hundred forty-nine".