864806577940 has 12 divisors (see below), whose sum is σ = 1816093813716. Its totient is φ = 345922631168.

The previous prime is 864806577889. The next prime is 864806577983. The reversal of 864806577940 is 49775608468.

864806577940 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 502924925584 + 361881652356 = 709172^2 + 601566^2 .

It is a congruent number.

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, 21620164429 + ... + 21620164468.

It is an arithmetic number, because the mean of its divisors is an integer number (151341151143).

Almost surely, 2^864806577940 is an apocalyptic number.

It is an amenable number.

864806577940 is an abundant number, since it is smaller than the sum of its proper divisors (951287235776).

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

864806577940 is a wasteful number, since it uses less digits than its factorization.

864806577940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43240328906 (or 43240328904 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 64.

The spelling of 864806577940 in words is "eight hundred sixty-four billion, eight hundred six million, five hundred seventy-seven thousand, nine hundred forty".