864281643 has 16 divisors (see below), whose sum is σ = 1190400000. Its totient is φ = 557202240.

The previous prime is 864281641. The next prime is 864281647. The reversal of 864281643 is 346182468.

864281643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 864281643 - 2¹ = 864281641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 864281595 and 864281604.

It is not an unprimeable number, because it can be changed into a prime (864281641) 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, 183583 + ... + 188231.

It is an arithmetic number, because the mean of its divisors is an integer number (74400000).

Almost surely, 2^864281643 is an apocalyptic number.

864281643 is a deficient number, since it is larger than the sum of its proper divisors (326118357).

864281643 is a wasteful number, since it uses less digits than its factorization.

864281643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6682.

The product of its digits is 221184, while the sum is 42.

The square root of 864281643 is about 29398.6673677567. The cubic root of 864281643 is about 952.5441107698.

The spelling of 864281643 in words is "eight hundred sixty-four million, two hundred eighty-one thousand, six hundred forty-three".