2645694949 has 2 divisors, whose sum is σ = 2645694950. Its totient is φ = 2645694948.

The previous prime is 2645694923. The next prime is 2645694967. The reversal of 2645694949 is 9494965462.

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., 1809906849 + 835788100 = 42543^2 + 28910^2 .

It is a cyclic number.

It is not a de Polignac number, because 2645694949 - 2⁵ = 2645694917 is a prime.

It is a super-2 number, since 2×2645694949² = 13999403526328225202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2645694893 and 2645694902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2645694049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322847474 + 1322847475.

It is an arithmetic number, because the mean of its divisors is an integer number (1322847475).

Almost surely, 2^2645694949 is an apocalyptic number.

It is an amenable number.

2645694949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645694949 is an equidigital number, since it uses as much as digits as its factorization.

2645694949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16796160, while the sum is 58.

The square root of 2645694949 is about 51436.3193570458. The cubic root of 2645694949 is about 1383.0777329595.

The spelling of 2645694949 in words is "two billion, six hundred forty-five million, six hundred ninety-four thousand, nine hundred forty-nine".