87655436040 has 128 divisors (see below), whose sum is σ = 279212832000. Its totient is φ = 21938331648.

The previous prime is 87655435949. The next prime is 87655436087. The reversal of 87655436040 is 4063455678.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 672516 + ... + 792204.

It is an arithmetic number, because the mean of its divisors is an integer number (2181350250).

Almost surely, 2^87655436040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87655436040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139606416000).

87655436040 is an abundant number, since it is smaller than the sum of its proper divisors (191557395960).

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

87655436040 is a wasteful number, since it uses less digits than its factorization.

87655436040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120079 (or 120075 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 48.

The spelling of 87655436040 in words is "eighty-seven billion, six hundred fifty-five million, four hundred thirty-six thousand, forty".