6542637427 has 2 divisors, whose sum is σ = 6542637428. Its totient is φ = 6542637426.

The previous prime is 6542637379. The next prime is 6542637463. The reversal of 6542637427 is 7247362456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6542637427 - 2¹⁹ = 6542113139 is a prime.

It is a super-2 number, since 2×6542637427² = 85612209002362360658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6542637467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271318713 + 3271318714.

It is an arithmetic number, because the mean of its divisors is an integer number (3271318714).

Almost surely, 2^6542637427 is an apocalyptic number.

6542637427 is a deficient number, since it is larger than the sum of its proper divisors (1).

6542637427 is an equidigital number, since it uses as much as digits as its factorization.

6542637427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 46.

The square root of 6542637427 is about 80886.5713638550. The cubic root of 6542637427 is about 1870.3273209524.

The spelling of 6542637427 in words is "six billion, five hundred forty-two million, six hundred thirty-seven thousand, four hundred twenty-seven".