87538087638 has 32 divisors (see below), whose sum is σ = 196417728000. Its totient is φ = 28896065928.

The previous prime is 87538087631. The next prime is 87538087739. The reversal of 87538087638 is 83678083578.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87538087631) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7863738 + ... + 7874861.

It is an arithmetic number, because the mean of its divisors is an integer number (6138054000).

Almost surely, 2^87538087638 is an apocalyptic number.

87538087638 is an abundant number, since it is smaller than the sum of its proper divisors (108879640362).

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

87538087638 is a wasteful number, since it uses less digits than its factorization.

87538087638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15738713 (or 15738707 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 63.

The spelling of 87538087638 in words is "eighty-seven billion, five hundred thirty-eight million, eighty-seven thousand, six hundred thirty-eight".