994555505555 has 24 divisors (see below), whose sum is σ = 1223510487696. Its totient is φ = 776095704320.

The previous prime is 994555505543. The next prime is 994555505591. The reversal of 994555505555 is 555505555499.

It is not a de Polignac number, because 994555505555 - 2¹⁴ = 994555489171 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89650589 + ... + 89661681.

It is an arithmetic number, because the mean of its divisors is an integer number (50979603654).

Almost surely, 2^994555505555 is an apocalyptic number.

994555505555 is a deficient number, since it is larger than the sum of its proper divisors (228954982141).

994555505555 is a wasteful number, since it uses less digits than its factorization.

994555505555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21847 (or 21806 counting only the distinct ones).

The product of its (nonzero) digits is 126562500, while the sum is 62.

The spelling of 994555505555 in words is "nine hundred ninety-four billion, five hundred fifty-five million, five hundred five thousand, five hundred fifty-five".