6543762749 has 2 divisors, whose sum is σ = 6543762750. Its totient is φ = 6543762748.

The previous prime is 6543762691. The next prime is 6543762769. The reversal of 6543762749 is 9472673456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5823216100 + 720546649 = 76310^2 + 26843^2 .

It is a cyclic number.

It is not a de Polignac number, because 6543762749 - 2³² = 2248795453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6543762749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6543762769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271881374 + 3271881375.

It is an arithmetic number, because the mean of its divisors is an integer number (3271881375).

Almost surely, 2^6543762749 is an apocalyptic number.

It is an amenable number.

6543762749 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543762749 is an equidigital number, since it uses as much as digits as its factorization.

6543762749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 53.

The square root of 6543762749 is about 80893.5272379688. The cubic root of 6543762749 is about 1870.4345457959.

The spelling of 6543762749 in words is "six billion, five hundred forty-three million, seven hundred sixty-two thousand, seven hundred forty-nine".