6549426491 has 2 divisors, whose sum is σ = 6549426492. Its totient is φ = 6549426490.

The previous prime is 6549426461. The next prime is 6549426557. The reversal of 6549426491 is 1946249456.

6549426491 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6549426491 - 2⁶ = 6549426427 is a prime.

It is a super-2 number, since 2×6549426491² = 85789974722025146162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6549426461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3274713245 + 3274713246.

It is an arithmetic number, because the mean of its divisors is an integer number (3274713246).

Almost surely, 2^6549426491 is an apocalyptic number.

6549426491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6549426491 is an equidigital number, since it uses as much as digits as its factorization.

6549426491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 50.

The square root of 6549426491 is about 80928.5270531968. The cubic root of 6549426491 is about 1870.9740215399.

The spelling of 6549426491 in words is "six billion, five hundred forty-nine million, four hundred twenty-six thousand, four hundred ninety-one".