87217119990 has 192 divisors, whose sum is σ = 304467351552. Its totient is φ = 16728940800.

The previous prime is 87217119943. The next prime is 87217120021. The reversal of 87217119990 is 9991171278.

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 95 ways as a sum of consecutive naturals, for example, 393966 + ... + 574145.

It is an arithmetic number, because the mean of its divisors is an integer number (1585767456).

Almost surely, 2^87217119990 is an apocalyptic number.

87217119990 is an abundant number, since it is smaller than the sum of its proper divisors (217250231562).

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

87217119990 is a wasteful number, since it uses less digits than its factorization.

87217119990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968155 (or 968152 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 54.

The spelling of 87217119990 in words is "eighty-seven billion, two hundred seventeen million, one hundred nineteen thousand, nine hundred ninety".