86642178404751 has 24 divisors (see below), whose sum is σ = 125240418055584. Its totient is φ = 57719646452160.

The previous prime is 86642178404731. The next prime is 86642178404791. The reversal of 86642178404751 is 15740487124668.

86642178404751 is a `hidden beast` number, since 8 + 6 + 6 + 4 + 2 + 178 + 404 + 7 + 51 = 666.

It is not a de Polignac number, because 86642178404751 - 2⁷ = 86642178404623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86642178404711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88386630 + ... + 89361516.

It is an arithmetic number, because the mean of its divisors is an integer number (5218350752316).

Almost surely, 2^{86642178404751} is an apocalyptic number.

86642178404751 is a deficient number, since it is larger than the sum of its proper divisors (38598239650833).

86642178404751 is a wasteful number, since it uses less digits than its factorization.

86642178404751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982031 (or 982028 counting only the distinct ones).

The product of its (nonzero) digits is 72253440, while the sum is 63.

The spelling of 86642178404751 in words is "eighty-six trillion, six hundred forty-two billion, one hundred seventy-eight million, four hundred four thousand, seven hundred fifty-one".