86178207851 has 4 divisors (see below), whose sum is σ = 86382907104. Its totient is φ = 85973508600.

The previous prime is 86178207847. The next prime is 86178207911. The reversal of 86178207851 is 15870287168.

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

It is a cyclic number.

It is not a de Polignac number, because 86178207851 - 2² = 86178207847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86178207793 and 86178207802.

It is not an unprimeable number, because it can be changed into a prime (86178207811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102348995 + ... + 102349836.

It is an arithmetic number, because the mean of its divisors is an integer number (21595726776).

Almost surely, 2^86178207851 is an apocalyptic number.

86178207851 is a deficient number, since it is larger than the sum of its proper divisors (204699253).

86178207851 is a wasteful number, since it uses less digits than its factorization.

86178207851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204699252.

The product of its (nonzero) digits is 1505280, while the sum is 53.

The spelling of 86178207851 in words is "eighty-six billion, one hundred seventy-eight million, two hundred seven thousand, eight hundred fifty-one".