6542638586 has 16 divisors (see below), whose sum is σ = 10787866848. Its totient is φ = 2951223600.

The previous prime is 6542638579. The next prime is 6542638633. The reversal of 6542638586 is 6858362456.

It is a super-2 number, since 2×6542638586² = 85612239334032158792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1132205 + ... + 1137968.

It is an arithmetic number, because the mean of its divisors is an integer number (674241678).

Almost surely, 2^6542638586 is an apocalyptic number.

6542638586 is a deficient number, since it is larger than the sum of its proper divisors (4245228262).

6542638586 is a wasteful number, since it uses less digits than its factorization.

6542638586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270317.

The product of its digits is 8294400, while the sum is 53.

The square root of 6542638586 is about 80886.5785282083. The cubic root of 6542638586 is about 1870.3274313925.

The spelling of 6542638586 in words is "six billion, five hundred forty-two million, six hundred thirty-eight thousand, five hundred eighty-six".