1985599274896 has 20 divisors (see below), whose sum is σ = 3851986927792. Its totient is φ = 991538132256.

The previous prime is 1985599274851. The next prime is 1985599274917. The reversal of 1985599274896 is 6984729955891.

It is a happy number.

It is a super-3 number, since 3×1985599274896³ (a number of 38 digits) contains 333 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 78831090 + ... + 78856273.

Almost surely, 2^{1985599274896} is an apocalyptic number.

1985599274896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1985599274896 is a deficient number, since it is larger than the sum of its proper divisors (1866387652896).

1985599274896 is a wasteful number, since it uses less digits than its factorization.

1985599274896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157688158 (or 157688152 counting only the distinct ones).

The product of its digits is 3527193600, while the sum is 82.

The spelling of 1985599274896 in words is "one trillion, nine hundred eighty-five billion, five hundred ninety-nine million, two hundred seventy-four thousand, eight hundred ninety-six".