2636379649 has 2 divisors, whose sum is σ = 2636379650. Its totient is φ = 2636379648.

The previous prime is 2636379643. The next prime is 2636379653. The reversal of 2636379649 is 9469736362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2375880049 + 260499600 = 48743^2 + 16140^2 .

It is a cyclic number.

It is not a de Polignac number, because 2636379649 - 2⁷ = 2636379521 is a prime.

It is a super-2 number, since 2×2636379649² = 13900995307322726402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2636379649.

It is not a weakly prime, because it can be changed into another prime (2636379643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1318189824 + 1318189825.

It is an arithmetic number, because the mean of its divisors is an integer number (1318189825).

Almost surely, 2^2636379649 is an apocalyptic number.

It is an amenable number.

2636379649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2636379649 is an equidigital number, since it uses as much as digits as its factorization.

2636379649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8817984, while the sum is 55.

The square root of 2636379649 is about 51345.6877351935. The cubic root of 2636379649 is about 1381.4525853318.

The spelling of 2636379649 in words is "two billion, six hundred thirty-six million, three hundred seventy-nine thousand, six hundred forty-nine".