87841643988 has 72 divisors (see below), whose sum is σ = 238495438272. Its totient is φ = 25090442496.

The previous prime is 87841643893. The next prime is 87841644017. The reversal of 87841643988 is 88934614878.

It is a happy number.

It is a super-3 number, since 3×87841643988³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2242620 + ... + 2281452.

Almost surely, 2^87841643988 is an apocalyptic number.

It is an amenable number.

87841643988 is an abundant number, since it is smaller than the sum of its proper divisors (150653794284).

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

87841643988 is a wasteful number, since it uses less digits than its factorization.

87841643988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42701 (or 42692 counting only the distinct ones).

The product of its digits is 74317824, while the sum is 66.

The spelling of 87841643988 in words is "eighty-seven billion, eight hundred forty-one million, six hundred forty-three thousand, nine hundred eighty-eight".