86912021968 has 20 divisors (see below), whose sum is σ = 168629570980. Its totient is φ = 43394713344.

The previous prime is 86912021953. The next prime is 86912022023.

86912021968 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 33683995024 + 53228026944 = 183532^2 + 230712^2 .

It is a super-2 number, since 2×86912021968² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 3819405 + ... + 3842092.

It is an arithmetic number, because the mean of its divisors is an integer number (8431478549).

Almost surely, 2^86912021968 is an apocalyptic number.

It is an amenable number.

86912021968 is a deficient number, since it is larger than the sum of its proper divisors (81717549012).

86912021968 is a wasteful number, since it uses less digits than its factorization.

86912021968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7662214 (or 7662208 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 86912021968 in words is "eighty-six billion, nine hundred twelve million, twenty-one thousand, nine hundred sixty-eight".