86216821576 has 8 divisors (see below), whose sum is σ = 161656540470. Its totient is φ = 43108410784.

The previous prime is 86216821567. The next prime is 86216821589. The reversal of 86216821576 is 67512861268.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 44955024676 + 41261796900 = 212026^2 + 203130^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5388551341 + ... + 5388551356.

Almost surely, 2^86216821576 is an apocalyptic number.

It is an amenable number.

86216821576 is a deficient number, since it is larger than the sum of its proper divisors (75439718894).

86216821576 is a wasteful number, since it uses less digits than its factorization.

86216821576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10777102703 (or 10777102699 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 52.

The spelling of 86216821576 in words is "eighty-six billion, two hundred sixteen million, eight hundred twenty-one thousand, five hundred seventy-six".