87011235520 has 168 divisors, whose sum is σ = 228047958432. Its totient is φ = 31598223360.

The previous prime is 87011235491. The next prime is 87011235529. The reversal of 87011235520 is 2553211078.

It is not an unprimeable number, because it can be changed into a prime (87011235529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56027064 + ... + 56028616.

It is an arithmetic number, because the mean of its divisors is an integer number (1357428324).

Almost surely, 2^87011235520 is an apocalyptic number.

87011235520 is a gapful number since it is divisible by the number (80) 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 87011235520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114023979216).

87011235520 is an abundant number, since it is smaller than the sum of its proper divisors (141036722912).

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

87011235520 is a wasteful number, since it uses less digits than its factorization.

87011235520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039 (or 3018 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

Adding to 87011235520 its reverse (2553211078), we get a palindrome (89564446598).

The spelling of 87011235520 in words is "eighty-seven billion, eleven million, two hundred thirty-five thousand, five hundred twenty".