87138655683178 has 16 divisors (see below), whose sum is σ = 142949697590304. Its totient is φ = 39508710381360.

The previous prime is 87138655683133. The next prime is 87138655683181.

It is a happy number.

87138655683178 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4988464800 + ... + 4988482267.

It is an arithmetic number, because the mean of its divisors is an integer number (8934356099394).

Almost surely, 2^{87138655683178} is an apocalyptic number.

87138655683178 is a deficient number, since it is larger than the sum of its proper divisors (55811041907126).

87138655683178 is a wasteful number, since it uses less digits than its factorization.

87138655683178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9976947477.

The product of its digits is 1625702400, while the sum is 76.

The spelling of 87138655683178 in words is "eighty-seven trillion, one hundred thirty-eight billion, six hundred fifty-five million, six hundred eighty-three thousand, one hundred seventy-eight".