87394409878 has 8 divisors (see below), whose sum is σ = 131092877520. Its totient is φ = 43696784040.

The previous prime is 87394409833. The next prime is 87394409909. The reversal of 87394409878 is 87890449378.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 254848 + ... + 489628.

It is an arithmetic number, because the mean of its divisors is an integer number (16386609690).

Almost surely, 2^87394409878 is an apocalyptic number.

87394409878 is a deficient number, since it is larger than the sum of its proper divisors (43698467642).

87394409878 is a wasteful number, since it uses less digits than its factorization.

87394409878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420902.

The product of its (nonzero) digits is 97542144, while the sum is 67.

The spelling of 87394409878 in words is "eighty-seven billion, three hundred ninety-four million, four hundred nine thousand, eight hundred seventy-eight".