864606144964 has 27 divisors (see below), whose sum is σ = 1529139164007. Its totient is φ = 427757074944.

The previous prime is 864606144959. The next prime is 864606144973. The reversal of 864606144964 is 469441606468.

The square root of 864606144964 is 929842.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 105337895364 + 759268249600 = 324558^2 + 871360^2 .

It is a super-2 number, since 2×864606144964² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 864606144899 and 864606144908.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 180386952 + ... + 180391744.

Almost surely, 2^864606144964 is an apocalyptic number.

864606144964 is the 929842-nd square number.

It is an amenable number.

864606144964 is a deficient number, since it is larger than the sum of its proper divisors (664533019043).

864606144964 is an frugal number, since it uses more digits than its factorization.

864606144964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9784 (or 4892 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 58.

The spelling of 864606144964 in words is "eight hundred sixty-four billion, six hundred six million, one hundred forty-four thousand, nine hundred sixty-four".