6489579620540 has 12 divisors (see below), whose sum is σ = 13628117203176. Its totient is φ = 2595831848208.

The previous prime is 6489579620539. The next prime is 6489579620581. The reversal of 6489579620540 is 450269759846.

It is a super-2 number, since 2×6489579620540² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162239490494 + ... + 162239490533.

It is an arithmetic number, because the mean of its divisors is an integer number (1135676433598).

Almost surely, 2^{6489579620540} is an apocalyptic number.

It is an amenable number.

6489579620540 is an abundant number, since it is smaller than the sum of its proper divisors (7138537582636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6489579620540 is a wasteful number, since it uses less digits than its factorization.

6489579620540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324478981036 (or 324478981034 counting only the distinct ones).

The product of its (nonzero) digits is 130636800, while the sum is 65.

The spelling of 6489579620540 in words is "six trillion, four hundred eighty-nine billion, five hundred seventy-nine million, six hundred twenty thousand, five hundred forty".