6216642240645 has 24 divisors (see below), whose sum is σ = 10566140729184. Its totient is φ = 3120510612736.

The previous prime is 6216642240643. The next prime is 6216642240659. The reversal of 6216642240645 is 5460422466126.

It is a happy number.

It is not a de Polignac number, because 6216642240645 - 2¹ = 6216642240643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6216642240594 and 6216642240603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6216642240643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 717024759 + ... + 717033428.

It is an arithmetic number, because the mean of its divisors is an integer number (440255863716).

Almost surely, 2^{6216642240645} is an apocalyptic number.

It is an amenable number.

6216642240645 is a deficient number, since it is larger than the sum of its proper divisors (4349498488539).

6216642240645 is a wasteful number, since it uses less digits than its factorization.

6216642240645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434058229 (or 1434058212 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 6216642240645 in words is "six trillion, two hundred sixteen billion, six hundred forty-two million, two hundred forty thousand, six hundred forty-five".