87171878399 has 8 divisors (see below), whose sum is σ = 89396015808. Its totient is φ = 84963133440.

The previous prime is 87171878369. The next prime is 87171878413. The reversal of 87171878399 is 99387817178.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87171878399 - 2¹⁶ = 87171812863 is a prime.

It is a super-2 number, since 2×87171878399² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87171878309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3836642 + ... + 3859295.

It is an arithmetic number, because the mean of its divisors is an integer number (11174501976).

Almost surely, 2^87171878399 is an apocalyptic number.

87171878399 is a deficient number, since it is larger than the sum of its proper divisors (2224137409).

87171878399 is a wasteful number, since it uses less digits than its factorization.

87171878399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7696225.

The product of its digits is 42674688, while the sum is 68.

The spelling of 87171878399 in words is "eighty-seven billion, one hundred seventy-one million, eight hundred seventy-eight thousand, three hundred ninety-nine".