6635757949 has 2 divisors, whose sum is σ = 6635757950. Its totient is φ = 6635757948.

The previous prime is 6635757943. The next prime is 6635757959. The reversal of 6635757949 is 9497575366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6293248900 + 342509049 = 79330^2 + 18507^2 .

It is a cyclic number.

It is not a de Polignac number, because 6635757949 - 2³ = 6635757941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6635757941) 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, 3317878974 + 3317878975.

It is an arithmetic number, because the mean of its divisors is an integer number (3317878975).

Almost surely, 2^6635757949 is an apocalyptic number.

It is an amenable number.

6635757949 is a deficient number, since it is larger than the sum of its proper divisors (1).

6635757949 is an equidigital number, since it uses as much as digits as its factorization.

6635757949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42865200, while the sum is 61.

The square root of 6635757949 is about 81460.1617295227. The cubic root of 6635757949 is about 1879.1589293666.

The spelling of 6635757949 in words is "six billion, six hundred thirty-five million, seven hundred fifty-seven thousand, nine hundred forty-nine".