6442521675 has 48 divisors (see below), whose sum is σ = 10945570272. Its totient is φ = 3341721600.

The previous prime is 6442521647. The next prime is 6442521707. The reversal of 6442521675 is 5761252446.

It is not a de Polignac number, because 6442521675 - 2¹⁴ = 6442505291 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1033167 + ... + 1039383.

It is an arithmetic number, because the mean of its divisors is an integer number (228032714).

Almost surely, 2^6442521675 is an apocalyptic number.

6442521675 is a deficient number, since it is larger than the sum of its proper divisors (4503048597).

6442521675 is a wasteful number, since it uses less digits than its factorization.

6442521675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6608 (or 6603 counting only the distinct ones).

The product of its digits is 403200, while the sum is 42.

The square root of 6442521675 is about 80265.3205002011. The cubic root of 6442521675 is about 1860.7382966278.

The spelling of 6442521675 in words is "six billion, four hundred forty-two million, five hundred twenty-one thousand, six hundred seventy-five".