1985904742118 has 8 divisors (see below), whose sum is σ = 3249662305320. Its totient is φ = 902683973680.

The previous prime is 1985904742117. The next prime is 1985904742139. The reversal of 1985904742118 is 8112474095891.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985904742111) 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, 45134198663 + ... + 45134198706.

It is an arithmetic number, because the mean of its divisors is an integer number (406207788165).

Almost surely, 2^{1985904742118} is an apocalyptic number.

1985904742118 is a deficient number, since it is larger than the sum of its proper divisors (1263757563202).

1985904742118 is a wasteful number, since it uses less digits than its factorization.

1985904742118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90268397382.

The product of its (nonzero) digits is 5806080, while the sum is 59.

The spelling of 1985904742118 in words is "one trillion, nine hundred eighty-five billion, nine hundred four million, seven hundred forty-two thousand, one hundred eighteen".