864694031922 has 294 divisors, whose sum is σ = 2301185939439. Its totient is φ = 243575783640.

The previous prime is 864694031879. The next prime is 864694031989. The reversal of 864694031922 is 229130496468.

864694031922 is a `hidden beast` number, since 8 + 6 + 46 + 9 + 403 + 192 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 432347015961 + 432347015961 = 657531^2 + 657531^2 .

It is a tau number, because it is divible by the number of its divisors (294).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=657531.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 146 ways as a sum of consecutive naturals, for example, 12178789147 + ... + 12178789217.

Almost surely, 2^864694031922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 864694031922

864694031922 is an abundant number, since it is smaller than the sum of its proper divisors (1436491907517).

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

864694031922 is an frugal number, since it uses more digits than its factorization.

864694031922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The spelling of 864694031922 in words is "eight hundred sixty-four billion, six hundred ninety-four million, thirty-one thousand, nine hundred twenty-two".