86132811978 has 24 divisors (see below), whose sum is σ = 186630545088. Its totient is φ = 28709483112.

The previous prime is 86132811959. The next prime is 86132811997. The reversal of 86132811978 is 87911823168.

86132811978 is a `hidden beast` number, since 8 + 613 + 2 + 8 + 1 + 19 + 7 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (86132811959) and next prime (86132811997).

It is a super-2 number, since 2×86132811978² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 279951 + ... + 500637.

It is an arithmetic number, because the mean of its divisors is an integer number (7776272712).

Almost surely, 2^86132811978 is an apocalyptic number.

86132811978 is an abundant number, since it is smaller than the sum of its proper divisors (100497733110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86132811978 is a wasteful number, since it uses less digits than its factorization.

86132811978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242378 (or 242375 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The spelling of 86132811978 in words is "eighty-six billion, one hundred thirty-two million, eight hundred eleven thousand, nine hundred seventy-eight".