6420639175 has 12 divisors (see below), whose sum is σ = 8307749520. Its totient is φ = 4913184320.

The previous prime is 6420639167. The next prime is 6420639227. The reversal of 6420639175 is 5719360246.

It is not a de Polignac number, because 6420639175 - 2³ = 6420639167 is a prime.

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, 5582590 + ... + 5583739.

It is an arithmetic number, because the mean of its divisors is an integer number (692312460).

Almost surely, 2^6420639175 is an apocalyptic number.

6420639175 is a deficient number, since it is larger than the sum of its proper divisors (1887110345).

6420639175 is a wasteful number, since it uses less digits than its factorization.

6420639175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11166362 (or 11166357 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 6420639175 is about 80128.8910131670. The cubic root of 6420639175 is about 1858.6291952988.

The spelling of 6420639175 in words is "six billion, four hundred twenty million, six hundred thirty-nine thousand, one hundred seventy-five".