88020665538 has 64 divisors (see below), whose sum is σ = 193612809600. Its totient is φ = 26513625600.

The previous prime is 88020665531. The next prime is 88020665549. The reversal of 88020665538 is 83556602088.

It is not an unprimeable number, because it can be changed into a prime (88020665531) by changing a digit.

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, 638373 + ... + 763911.

It is an arithmetic number, because the mean of its divisors is an integer number (3025200150).

Almost surely, 2^88020665538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 88020665538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96806404800).

88020665538 is an abundant number, since it is smaller than the sum of its proper divisors (105592144062).

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

88020665538 is a wasteful number, since it uses less digits than its factorization.

88020665538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125747.

The product of its (nonzero) digits is 2764800, while the sum is 51.

The spelling of 88020665538 in words is "eighty-eight billion, twenty million, six hundred sixty-five thousand, five hundred thirty-eight".