5644540364661 has 32 divisors (see below), whose sum is σ = 9272038515840. Its totient is φ = 3364852665600.

The previous prime is 5644540364647. The next prime is 5644540364663. The reversal of 5644540364661 is 1664630454465.

5644540364661 is a `hidden beast` number, since 5 + 6 + 4 + 4 + 540 + 36 + 4 + 6 + 61 = 666.

It is not a de Polignac number, because 5644540364661 - 2⁵ = 5644540364629 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5644540364598 and 5644540364607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5644540364663) 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, 155762100 + ... + 155798333.

It is an arithmetic number, because the mean of its divisors is an integer number (289751203620).

Almost surely, 2^{5644540364661} is an apocalyptic number.

It is an amenable number.

5644540364661 is a deficient number, since it is larger than the sum of its proper divisors (3627498151179).

5644540364661 is a wasteful number, since it uses less digits than its factorization.

5644540364661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311560514 (or 311560508 counting only the distinct ones).

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

The spelling of 5644540364661 in words is "five trillion, six hundred forty-four billion, five hundred forty million, three hundred sixty-four thousand, six hundred sixty-one".