864163388540 has 48 divisors (see below), whose sum is σ = 1873679856384. Its totient is φ = 334444032000.

The previous prime is 864163388521. The next prime is 864163388549. The reversal of 864163388540 is 45883361468.

864163388540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864163388549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2831462 + ... + 3121778.

It is an arithmetic number, because the mean of its divisors is an integer number (39034997008).

Almost surely, 2^864163388540 is an apocalyptic number.

It is an amenable number.

864163388540 is an abundant number, since it is smaller than the sum of its proper divisors (1009516467844).

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

864163388540 is a wasteful number, since it uses less digits than its factorization.

864163388540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295158 (or 295156 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 56.

The spelling of 864163388540 in words is "eight hundred sixty-four billion, one hundred sixty-three million, three hundred eighty-eight thousand, five hundred forty".