5645240736621 has 16 divisors (see below), whose sum is σ = 7779542604288. Its totient is φ = 3637521000000.

The previous prime is 5645240736613. The next prime is 5645240736623. The reversal of 5645240736621 is 1266370425465.

5645240736621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5645240736621 - 2³ = 5645240736613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5645240736623) 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, 38007130 + ... + 38155371.

It is an arithmetic number, because the mean of its divisors is an integer number (486221412768).

Almost surely, 2^{5645240736621} is an apocalyptic number.

It is an amenable number.

5645240736621 is a deficient number, since it is larger than the sum of its proper divisors (2134301867667).

5645240736621 is a wasteful number, since it uses less digits than its factorization.

5645240736621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76163332.

The product of its (nonzero) digits is 7257600, while the sum is 51.

The spelling of 5645240736621 in words is "five trillion, six hundred forty-five billion, two hundred forty million, seven hundred thirty-six thousand, six hundred twenty-one".