223643889472861 has 64 divisors (see below), whose sum is σ = 265656562617600. Its totient is φ = 185603936716800.

The previous prime is 223643889472841. The next prime is 223643889472877. The reversal of 223643889472861 is 168274988346322.

It is a cyclic number.

It is not a de Polignac number, because 223643889472861 - 2¹³ = 223643889464669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223643889472841) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15435418905 + ... + 15435433393.

It is an arithmetic number, because the mean of its divisors is an integer number (4150883790900).

Almost surely, 2^{223643889472861} is an apocalyptic number.

It is an amenable number.

223643889472861 is a deficient number, since it is larger than the sum of its proper divisors (42012673144739).

223643889472861 is a wasteful number, since it uses less digits than its factorization.

223643889472861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17950.

The product of its digits is 1337720832, while the sum is 73.

The spelling of 223643889472861 in words is "two hundred twenty-three trillion, six hundred forty-three billion, eight hundred eighty-nine million, four hundred seventy-two thousand, eight hundred sixty-one".