1987119631608 has 64 divisors (see below), whose sum is σ = 5140445587200. Its totient is φ = 639699836160.

The previous prime is 1987119631591. The next prime is 1987119631621. The reversal of 1987119631608 is 8061369117891.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 10725588 + ... + 10909283.

It is an arithmetic number, because the mean of its divisors is an integer number (80319462300).

Almost surely, 2^{1987119631608} is an apocalyptic number.

It is an amenable number.

1987119631608 is an abundant number, since it is smaller than the sum of its proper divisors (3153325955592).

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

1987119631608 is a wasteful number, since it uses less digits than its factorization.

1987119631608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21635012 (or 21635008 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 60.

The spelling of 1987119631608 in words is "one trillion, nine hundred eighty-seven billion, one hundred nineteen million, six hundred thirty-one thousand, six hundred eight".