1985914485915 has 8 divisors (see below), whose sum is σ = 3177463177488. Its totient is φ = 1059154392480.

The previous prime is 1985914485887. The next prime is 1985914485917. The reversal of 1985914485915 is 5195844195891.

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

It is not a de Polignac number, because 1985914485915 - 2¹² = 1985914481819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1985914485915.

It is not an unprimeable number, because it can be changed into a prime (1985914485917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66197149516 + ... + 66197149545.

It is an arithmetic number, because the mean of its divisors is an integer number (397182897186).

Almost surely, 2^{1985914485915} is an apocalyptic number.

1985914485915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1985914485915 is a deficient number, since it is larger than the sum of its proper divisors (1191548691573).

1985914485915 is a wasteful number, since it uses less digits than its factorization.

1985914485915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132394299069.

The product of its digits is 93312000, while the sum is 69.

The spelling of 1985914485915 in words is "one trillion, nine hundred eighty-five billion, nine hundred fourteen million, four hundred eighty-five thousand, nine hundred fifteen".