6537559939845 has 64 divisors (see below), whose sum is σ = 12228959729664. Its totient is φ = 2949968229120.

The previous prime is 6537559939777. The next prime is 6537559939877. The reversal of 6537559939845 is 5489399557356.

It is not a de Polignac number, because 6537559939845 - 2⁷ = 6537559939717 is a prime.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 23139007 + ... + 23419836.

It is an arithmetic number, because the mean of its divisors is an integer number (191077495776).

Almost surely, 2^{6537559939845} is an apocalyptic number.

It is an amenable number.

6537559939845 is a deficient number, since it is larger than the sum of its proper divisors (5691399789819).

6537559939845 is a wasteful number, since it uses less digits than its factorization.

6537559939845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46558922.

The product of its digits is 5511240000, while the sum is 78.

The spelling of 6537559939845 in words is "six trillion, five hundred thirty-seven billion, five hundred fifty-nine million, nine hundred thirty-nine thousand, eight hundred forty-five".