86978639170 has 8 divisors (see below), whose sum is σ = 156561550524. Its totient is φ = 34791455664.

The previous prime is 86978639161. The next prime is 86978639171. The reversal of 86978639170 is 7193687968.

It can be written as a sum of positive squares in 2 ways, for example, as 71418821049 + 15559818121 = 267243^2 + 124739^2 .

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

It is not an unprimeable number, because it can be changed into a prime (86978639171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4348931949 + ... + 4348931968.

Almost surely, 2^86978639170 is an apocalyptic number.

86978639170 is a deficient number, since it is larger than the sum of its proper divisors (69582911354).

86978639170 is a wasteful number, since it uses less digits than its factorization.

86978639170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8697863924.

The product of its (nonzero) digits is 27433728, while the sum is 64.

The spelling of 86978639170 in words is "eighty-six billion, nine hundred seventy-eight million, six hundred thirty-nine thousand, one hundred seventy".