6439342572 has 36 divisors (see below), whose sum is σ = 17529322720. Its totient is φ = 1981336032.

The previous prime is 6439342571. The next prime is 6439342577. The reversal of 6439342572 is 2752439346.

6439342572 is a `hidden beast` number, since 6 + 4 + 39 + 3 + 42 + 572 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (6439342571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6879172 + ... + 6880107.

Almost surely, 2^6439342572 is an apocalyptic number.

It is an amenable number.

6439342572 is an abundant number, since it is smaller than the sum of its proper divisors (11089980148).

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

6439342572 is a wasteful number, since it uses less digits than its factorization.

6439342572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13759302 (or 13759297 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 45.

The square root of 6439342572 is about 80245.5143419244. The cubic root of 6439342572 is about 1860.4321819170.

The spelling of 6439342572 in words is "six billion, four hundred thirty-nine million, three hundred forty-two thousand, five hundred seventy-two".