6544021425 has 12 divisors (see below), whose sum is σ = 10819448880. Its totient is φ = 3490144720.

The previous prime is 6544021423. The next prime is 6544021427. The reversal of 6544021425 is 5241204456.

It is an interprime number because it is at equal distance from previous prime (6544021423) and next prime (6544021427).

It is not a de Polignac number, because 6544021425 - 2¹ = 6544021423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6544021423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43626735 + ... + 43626884.

It is an arithmetic number, because the mean of its divisors is an integer number (901620740).

Almost surely, 2^6544021425 is an apocalyptic number.

It is an amenable number.

6544021425 is a deficient number, since it is larger than the sum of its proper divisors (4275427455).

6544021425 is a wasteful number, since it uses less digits than its factorization.

6544021425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87253632 (or 87253627 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The square root of 6544021425 is about 80895.1260892768. The cubic root of 6544021425 is about 1870.4591916646.

The spelling of 6544021425 in words is "six billion, five hundred forty-four million, twenty-one thousand, four hundred twenty-five".