6544085987 has 8 divisors (see below), whose sum is σ = 6613367376. Its totient is φ = 6475116672.

The previous prime is 6544085983. The next prime is 6544086011. The reversal of 6544085987 is 7895804456.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6544085987 - 2² = 6544085983 is a prime.

It is a super-2 number, since 2×6544085987² = 85650122810499528338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6544085983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35738 + ... + 119855.

It is an arithmetic number, because the mean of its divisors is an integer number (826670922).

Almost surely, 2^6544085987 is an apocalyptic number.

6544085987 is a deficient number, since it is larger than the sum of its proper divisors (69281389).

6544085987 is a wasteful number, since it uses less digits than its factorization.

6544085987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156037.

The product of its (nonzero) digits is 9676800, while the sum is 56.

The square root of 6544085987 is about 80895.5251358195. The cubic root of 6544085987 is about 1870.4653428358.

The spelling of 6544085987 in words is "six billion, five hundred forty-four million, eighty-five thousand, nine hundred eighty-seven".