505550445643 has 4 divisors (see below), whose sum is σ = 506656683400. Its totient is φ = 504444207888.

The previous prime is 505550445641. The next prime is 505550445677. The reversal of 505550445643 is 346544055505.

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 505550445643 - 2¹ = 505550445641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505550445593 and 505550445602.

It is not an unprimeable number, because it can be changed into a prime (505550445641) 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, 553118193 + ... + 553119106.

It is an arithmetic number, because the mean of its divisors is an integer number (126664170850).

Almost surely, 2^505550445643 is an apocalyptic number.

505550445643 is a deficient number, since it is larger than the sum of its proper divisors (1106237757).

505550445643 is a wasteful number, since it uses less digits than its factorization.

505550445643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106237756.

The product of its (nonzero) digits is 3600000, while the sum is 46.

The spelling of 505550445643 in words is "five hundred five billion, five hundred fifty million, four hundred forty-five thousand, six hundred forty-three".