864533675620 has 12 divisors (see below), whose sum is σ = 1815520718844. Its totient is φ = 345813470240.

The previous prime is 864533675611. The next prime is 864533675639. The reversal of 864533675620 is 26576335468.

864533675620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 87445586944 + 777088088676 = 295712^2 + 881526^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21613341871 + ... + 21613341910.

It is an arithmetic number, because the mean of its divisors is an integer number (151293393237).

Almost surely, 2^864533675620 is an apocalyptic number.

It is an amenable number.

864533675620 is an abundant number, since it is smaller than the sum of its proper divisors (950987043224).

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

864533675620 is a wasteful number, since it uses less digits than its factorization.

864533675620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43226683790 (or 43226683788 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 55.

The spelling of 864533675620 in words is "eight hundred sixty-four billion, five hundred thirty-three million, six hundred seventy-five thousand, six hundred twenty".