189655556443 has 4 divisors (see below), whose sum is σ = 189660920488. Its totient is φ = 189650192400.

The previous prime is 189655556393. The next prime is 189655556477. The reversal of 189655556443 is 344655556981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 189655556443 - 2²¹ = 189653459291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189655556843) 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, 2628633 + ... + 2699818.

It is an arithmetic number, because the mean of its divisors is an integer number (47415230122).

Almost surely, 2^189655556443 is an apocalyptic number.

189655556443 is a deficient number, since it is larger than the sum of its proper divisors (5364045).

189655556443 is an equidigital number, since it uses as much as digits as its factorization.

189655556443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5364044.

The product of its digits is 77760000, while the sum is 61.

The spelling of 189655556443 in words is "one hundred eighty-nine billion, six hundred fifty-five million, five hundred fifty-six thousand, four hundred forty-three".