87856665878 has 8 divisors (see below), whose sum is σ = 131815852968. Its totient is φ = 43918048224.

The previous prime is 87856665877. The next prime is 87856665961.

87856665878 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87856665877) 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 3 ways as a sum of consecutive naturals, for example, 5131676 + ... + 5148767.

It is an arithmetic number, because the mean of its divisors is an integer number (16476981621).

Almost surely, 2^87856665878 is an apocalyptic number.

87856665878 is a deficient number, since it is larger than the sum of its proper divisors (43959187090).

87856665878 is a wasteful number, since it uses less digits than its factorization.

87856665878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10284718.

The product of its digits is 1083801600, while the sum is 74.

The spelling of 87856665878 in words is "eighty-seven billion, eight hundred fifty-six million, six hundred sixty-five thousand, eight hundred seventy-eight".