87558516864 has 1280 divisors, whose sum is σ = 349335866880. Its totient is φ = 21116878848.

The previous prime is 87558516823. The next prime is 87558516869. The reversal of 87558516864 is 46861585578.

87558516864 is a `hidden beast` number, since 8 + 7 + 5 + 58 + 516 + 8 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (87558516869) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 850082637 + ... + 850082739.

It is an arithmetic number, because the mean of its divisors is an integer number (272918646).

Almost surely, 2^87558516864 is an apocalyptic number.

87558516864 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87558516864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174667933440).

87558516864 is an abundant number, since it is smaller than the sum of its proper divisors (261777350016).

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

87558516864 is a wasteful number, since it uses less digits than its factorization.

87558516864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 198 counting only the distinct ones).

The product of its digits is 64512000, while the sum is 63.

The spelling of 87558516864 in words is "eighty-seven billion, five hundred fifty-eight million, five hundred sixteen thousand, eight hundred sixty-four".