5641884163861 has 4 divisors (see below), whose sum is σ = 6154782724224. Its totient is φ = 5128985603500.

The previous prime is 5641884163829. The next prime is 5641884163931. The reversal of 5641884163861 is 1683614881465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5641884163861 - 2⁵ = 5641884163829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5641884163861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5641884163061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256449280165 + ... + 256449280186.

It is an arithmetic number, because the mean of its divisors is an integer number (1538695681056).

Almost surely, 2^{5641884163861} is an apocalyptic number.

It is an amenable number.

5641884163861 is a deficient number, since it is larger than the sum of its proper divisors (512898560363).

5641884163861 is a wasteful number, since it uses less digits than its factorization.

5641884163861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512898560362.

The product of its digits is 26542080, while the sum is 61.

The spelling of 5641884163861 in words is "five trillion, six hundred forty-one billion, eight hundred eighty-four million, one hundred sixty-three thousand, eight hundred sixty-one".