6425557344 has 72 divisors (see below), whose sum is σ = 18766566000. Its totient is φ = 2083961088.

The previous prime is 6425557339. The next prime is 6425557363. The reversal of 6425557344 is 4437555246.

6425557344 is a `hidden beast` number, since 6 + 4 + 255 + 57 + 344 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 6425557344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 290844 + ... + 312155.

It is an arithmetic number, because the mean of its divisors is an integer number (260646750).

Almost surely, 2^6425557344 is an apocalyptic number.

It is an amenable number.

6425557344 is an abundant number, since it is smaller than the sum of its proper divisors (12341008656).

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

6425557344 is a wasteful number, since it uses less digits than its factorization.

6425557344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603052 (or 603041 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 45.

The square root of 6425557344 is about 80159.5742503664. The cubic root of 6425557344 is about 1859.1036402483.

The spelling of 6425557344 in words is "six billion, four hundred twenty-five million, five hundred fifty-seven thousand, three hundred forty-four".