87840523873998 has 128 divisors (see below), whose sum is σ = 238224208896000. Its totient is φ = 23450195381760.

The previous prime is 87840523873979. The next prime is 87840523874017. The reversal of 87840523873998 is 89937832504878.

87840523873998 is a `hidden beast` number, since 8 + 7 + 8 + 4 + 0 + 523 + 87 + 3 + 9 + 9 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (87840523873979) and next prime (87840523874017).

It is a super-3 number, since 3×87840523873998³ (a number of 43 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 (31) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 128905083 + ... + 129584726.

It is an arithmetic number, because the mean of its divisors is an integer number (1861126632000).

Almost surely, 2^{87840523873998} is an apocalyptic number.

87840523873998 is an abundant number, since it is smaller than the sum of its proper divisors (150383685022002).

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

87840523873998 is a wasteful number, since it uses less digits than its factorization.

87840523873998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258489887 (or 258489881 counting only the distinct ones).

The product of its (nonzero) digits is 5852528640, while the sum is 81.

The spelling of 87840523873998 in words is "eighty-seven trillion, eight hundred forty billion, five hundred twenty-three million, eight hundred seventy-three thousand, nine hundred ninety-eight".