6540642656046 has 64 divisors (see below), whose sum is σ = 14715691660800. Its totient is φ = 2179993639320.

The previous prime is 6540642656021. The next prime is 6540642656047. The reversal of 6540642656046 is 6406562460456.

6540642656046 is a `hidden beast` number, since 6 + 5 + 4 + 0 + 6 + 4 + 26 + 5 + 604 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 6540642655983 and 6540642656001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540642656047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46429665 + ... + 46570323.

It is an arithmetic number, because the mean of its divisors is an integer number (229932682200).

Almost surely, 2^{6540642656046} is an apocalyptic number.

6540642656046 is an abundant number, since it is smaller than the sum of its proper divisors (8175049004754).

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

6540642656046 is a wasteful number, since it uses less digits than its factorization.

6540642656046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151313 (or 151295 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 54.

The spelling of 6540642656046 in words is "six trillion, five hundred forty billion, six hundred forty-two million, six hundred fifty-six thousand, forty-six".