86178821632 has 20 divisors (see below), whose sum is σ = 172189326276. Its totient is φ = 43089410560.

The previous prime is 86178821627. The next prime is 86178821689. The reversal of 86178821632 is 23612887168.

It is a super-2 number, since 2×86178821632² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 86178821632.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84158494 + ... + 84159517.

Almost surely, 2^86178821632 is an apocalyptic number.

It is an amenable number.

86178821632 is a deficient number, since it is larger than the sum of its proper divisors (86010504644).

86178821632 is an equidigital number, since it uses as much as digits as its factorization.

86178821632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168318029 (or 168318013 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 52.

The spelling of 86178821632 in words is "eighty-six billion, one hundred seventy-eight million, eight hundred twenty-one thousand, six hundred thirty-two".