987995975992 has 16 divisors (see below), whose sum is σ = 1852806684960. Its totient is φ = 493914193344.

The previous prime is 987995975969. The next prime is 987995976053. The reversal of 987995975992 is 299579599789.

It is a super-2 number, since 2×987995975992² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10424208 + ... + 10518559.

It is an arithmetic number, because the mean of its divisors is an integer number (115800417810).

Almost surely, 2^987995975992 is an apocalyptic number.

It is an amenable number.

987995975992 is a deficient number, since it is larger than the sum of its proper divisors (864810708968).

987995975992 is a wasteful number, since it uses less digits than its factorization.

987995975992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20948670 (or 20948666 counting only the distinct ones).

The product of its digits is 10416243600, while the sum is 88.

The spelling of 987995975992 in words is "nine hundred eighty-seven billion, nine hundred ninety-five million, nine hundred seventy-five thousand, nine hundred ninety-two".