88171209861 has 16 divisors (see below), whose sum is σ = 135059570688. Its totient is φ = 50119758000.

The previous prime is 88171209859. The next prime is 88171209881. The reversal of 88171209861 is 16890217188.

It is a happy number.

It is not a de Polignac number, because 88171209861 - 2¹ = 88171209859 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88171209851) 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 15 ways as a sum of consecutive naturals, for example, 10987165 + ... + 10995186.

It is an arithmetic number, because the mean of its divisors is an integer number (8441223168).

Almost surely, 2^88171209861 is an apocalyptic number.

It is an amenable number.

88171209861 is a deficient number, since it is larger than the sum of its proper divisors (46888360827).

88171209861 is a wasteful number, since it uses less digits than its factorization.

88171209861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21982552.

The product of its (nonzero) digits is 387072, while the sum is 51.

The spelling of 88171209861 in words is "eighty-eight billion, one hundred seventy-one million, two hundred nine thousand, eight hundred sixty-one".