86542178348858 has 4 divisors (see below), whose sum is σ = 129813267523290. Its totient is φ = 43271089174428.

The previous prime is 86542178348849. The next prime is 86542178348867. The reversal of 86542178348858 is 85884387124568.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (86542178348849) and next prime (86542178348867).

It can be written as a sum of positive squares in only one way, i.e., 57661044819169 + 28881133529689 = 7593487^2 + 5374117^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21635544587213 + ... + 21635544587216.

Almost surely, 2^{86542178348858} is an apocalyptic number.

86542178348858 is a deficient number, since it is larger than the sum of its proper divisors (43271089174432).

86542178348858 is a wasteful number, since it uses less digits than its factorization.

86542178348858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43271089174431.

The product of its digits is 3303014400, while the sum is 77.

The spelling of 86542178348858 in words is "eighty-six trillion, five hundred forty-two billion, one hundred seventy-eight million, three hundred forty-eight thousand, eight hundred fifty-eight".