6544739401 has 16 divisors (see below), whose sum is σ = 7069628160. Its totient is φ = 6040175680.

The previous prime is 6544739389. The next prime is 6544739491. The reversal of 6544739401 is 1049374456.

It is not a de Polignac number, because 6544739401 - 2⁷ = 6544739273 is a prime.

It is a super-2 number, since 2×6544739401² = 85667227654003677602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6544739491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1425756 + ... + 1430338.

It is an arithmetic number, because the mean of its divisors is an integer number (441851760).

Almost surely, 2^6544739401 is an apocalyptic number.

It is an amenable number.

6544739401 is a deficient number, since it is larger than the sum of its proper divisors (524888759).

6544739401 is a wasteful number, since it uses less digits than its factorization.

6544739401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6776.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 6544739401 is about 80899.5636638418. The cubic root of 6544739401 is about 1870.5275948482.

The spelling of 6544739401 in words is "six billion, five hundred forty-four million, seven hundred thirty-nine thousand, four hundred one".