6425644016 has 30 divisors (see below), whose sum is σ = 13684368936. Its totient is φ = 2920746400.

The previous prime is 6425644013. The next prime is 6425644019. The reversal of 6425644016 is 6104465246.

It is an interprime number because it is at equal distance from previous prime (6425644013) and next prime (6425644019).

It is a super-3 number, since 3×6425644016³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6425644013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1657580 + ... + 1661451.

Almost surely, 2^6425644016 is an apocalyptic number.

It is an amenable number.

6425644016 is an abundant number, since it is smaller than the sum of its proper divisors (7258724920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6425644016 is a wasteful number, since it uses less digits than its factorization.

6425644016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319061 (or 3319044 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 6425644016 is about 80160.1148701772. The cubic root of 6425644016 is about 1859.1119991344. Note that the first 3 decimals are identical.

The spelling of 6425644016 in words is "six billion, four hundred twenty-five million, six hundred forty-four thousand, sixteen".