87840155520 has 768 divisors, whose sum is σ = 355871880000. Its totient is φ = 19768541184.

The previous prime is 87840155483. The next prime is 87840155527. The reversal of 87840155520 is 2555104878.

87840155520 is a `hidden beast` number, since 8 + 7 + 84 + 0 + 15 + 552 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87840155527) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 41257816 + ... + 41259944.

Almost surely, 2^87840155520 is an apocalyptic number.

87840155520 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 87840155520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177935940000).

87840155520 is an abundant number, since it is smaller than the sum of its proper divisors (268031724480).

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

87840155520 is a wasteful number, since it uses less digits than its factorization.

87840155520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215 (or 2200 counting only the distinct ones).

The product of its (nonzero) digits is 448000, while the sum is 45.

The spelling of 87840155520 in words is "eighty-seven billion, eight hundred forty million, one hundred fifty-five thousand, five hundred twenty".