17959939945 has 8 divisors (see below), whose sum is σ = 21905238600. Its totient is φ = 14132411520.

The previous prime is 17959939927. The next prime is 17959939951. The reversal of 17959939945 is 54993995971.

It can be written as a sum of positive squares in 4 ways, for example, as 910892761 + 17049047184 = 30181^2 + 130572^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 17959939945 - 2¹³ = 17959931753 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29442220 + ... + 29442829.

It is an arithmetic number, because the mean of its divisors is an integer number (2738154825).

Almost surely, 2^17959939945 is an apocalyptic number.

It is an amenable number.

17959939945 is a deficient number, since it is larger than the sum of its proper divisors (3945298655).

17959939945 is an equidigital number, since it uses as much as digits as its factorization.

17959939945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58885115.

The product of its digits is 124002900, while the sum is 70.

The spelling of 17959939945 in words is "seventeen billion, nine hundred fifty-nine million, nine hundred thirty-nine thousand, nine hundred forty-five".