1985867384592 has 120 divisors (see below), whose sum is σ = 6426790700736. Its totient is φ = 523745236224.

The previous prime is 1985867384549. The next prime is 1985867384593. The reversal of 1985867384592 is 2954837685891.

It is not an unprimeable number, because it can be changed into a prime (1985867384593) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32443708 + ... + 32504859.

Almost surely, 2^{1985867384592} is an apocalyptic number.

1985867384592 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1985867384592 is an abundant number, since it is smaller than the sum of its proper divisors (4440923316144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1985867384592 is a wasteful number, since it uses less digits than its factorization.

1985867384592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64948605 (or 64948592 counting only the distinct ones).

The product of its digits is 1045094400, while the sum is 75.

The spelling of 1985867384592 in words is "one trillion, nine hundred eighty-five billion, eight hundred sixty-seven million, three hundred eighty-four thousand, five hundred ninety-two".