655555554444443 has 4 divisors (see below), whose sum is σ = 655781842177560. Its totient is φ = 655329266711328.

The previous prime is 655555554444403. The next prime is 655555554444503. The reversal of 655555554444443 is 344444455555556.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655555554444443 is a prime.

It is a super-2 number, since 2×655555554444443² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (655555554444403) 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, 113143862213 + ... + 113143868006.

It is an arithmetic number, because the mean of its divisors is an integer number (163945460544390).

Almost surely, 2^{655555554444443} is an apocalyptic number.

655555554444443 is a deficient number, since it is larger than the sum of its proper divisors (226287733117).

655555554444443 is a wasteful number, since it uses less digits than its factorization.

655555554444443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226287733116.

The product of its digits is 5760000000, while the sum is 68.

The spelling of 655555554444443 in words is "six hundred fifty-five trillion, five hundred fifty-five billion, five hundred fifty-four million, four hundred forty-four thousand, four hundred forty-three".