2811970649 has 2 divisors, whose sum is σ = 2811970650. Its totient is φ = 2811970648.

The previous prime is 2811970643. The next prime is 2811970657. The reversal of 2811970649 is 9460791182.

2811970649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2443522624 + 368448025 = 49432^2 + 19195^2 .

It is a cyclic number.

It is not a de Polignac number, because 2811970649 - 2⁴ = 2811970633 is a prime.

It is not a weakly prime, because it can be changed into another prime (2811970643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1405985324 + 1405985325.

It is an arithmetic number, because the mean of its divisors is an integer number (1405985325).

Almost surely, 2^2811970649 is an apocalyptic number.

It is an amenable number.

2811970649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2811970649 is an equidigital number, since it uses as much as digits as its factorization.

2811970649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 2811970649 is about 53028.0175850465. The cubic root of 2811970649 is about 1411.4654798338.

The spelling of 2811970649 in words is "two billion, eight hundred eleven million, nine hundred seventy thousand, six hundred forty-nine".