6540012563256 has 64 divisors (see below), whose sum is σ = 19235331079200. Its totient is φ = 2051768646144.

The previous prime is 6540012563251. The next prime is 6540012563267. The reversal of 6540012563256 is 6523652100456.

6540012563256 is a `hidden beast` number, since 6 + 5 + 4 + 0 + 0 + 1 + 2 + 5 + 632 + 5 + 6 = 666.

It is a super-3 number, since 3×6540012563256³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540012563251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 890520915 + ... + 890528258.

Almost surely, 2^{6540012563256} is an apocalyptic number.

It is an amenable number.

6540012563256 is an abundant number, since it is smaller than the sum of its proper divisors (12695318515944).

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

6540012563256 is a wasteful number, since it uses less digits than its factorization.

6540012563256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781049205 (or 1781049195 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 6540012563256 in words is "six trillion, five hundred forty billion, twelve million, five hundred sixty-three thousand, two hundred fifty-six".