6542927749 has 2 divisors, whose sum is σ = 6542927750. Its totient is φ = 6542927748.

The previous prime is 6542927719. The next prime is 6542927753. The reversal of 6542927749 is 9477292456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5429037124 + 1113890625 = 73682^2 + 33375^2 .

It is a cyclic number.

It is not a de Polignac number, because 6542927749 - 2¹⁷ = 6542796677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6542927749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6542927719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271463874 + 3271463875.

It is an arithmetic number, because the mean of its divisors is an integer number (3271463875).

Almost surely, 2^6542927749 is an apocalyptic number.

It is an amenable number.

6542927749 is a deficient number, since it is larger than the sum of its proper divisors (1).

6542927749 is an equidigital number, since it uses as much as digits as its factorization.

6542927749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 55.

The square root of 6542927749 is about 80888.3659681663. The cubic root of 6542927749 is about 1870.3549850834.

The spelling of 6542927749 in words is "six billion, five hundred forty-two million, nine hundred twenty-seven thousand, seven hundred forty-nine".