6539673941892 has 648 divisors, whose sum is σ = 22199822211840. Its totient is φ = 1668979831680.

The previous prime is 6539673941863. The next prime is 6539673941893. The reversal of 6539673941892 is 2981493769356.

6539673941892 is a `hidden beast` number, since 6 + 5 + 3 + 96 + 7 + 39 + 418 + 92 = 666.

It is a super-2 number, since 2×6539673941892² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6539673941892.

It is not an unprimeable number, because it can be changed into a prime (6539673941893) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 518233959 + ... + 518246577.

Almost surely, 2^{6539673941892} is an apocalyptic number.

6539673941892 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6539673941892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11099911105920).

6539673941892 is an abundant number, since it is smaller than the sum of its proper divisors (15660148269948).

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

6539673941892 is a wasteful number, since it uses less digits than its factorization.

6539673941892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12705 (or 12675 counting only the distinct ones).

The product of its digits is 529079040, while the sum is 72.

The spelling of 6539673941892 in words is "six trillion, five hundred thirty-nine billion, six hundred seventy-three million, nine hundred forty-one thousand, eight hundred ninety-two".