864436666443 has 16 divisors (see below), whose sum is σ = 1317251183616. Its totient is φ = 493958424960.

The previous prime is 864436666433. The next prime is 864436666469. The reversal of 864436666443 is 344666634468.

It is a happy number.

It is not a de Polignac number, because 864436666443 - 2²² = 864432472139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (864436666433) 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, 2540355 + ... + 2860467.

It is an arithmetic number, because the mean of its divisors is an integer number (82328198976).

Almost surely, 2^864436666443 is an apocalyptic number.

864436666443 is a deficient number, since it is larger than the sum of its proper divisors (452814517173).

864436666443 is a wasteful number, since it uses less digits than its factorization.

864436666443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448714.

The product of its digits is 143327232, while the sum is 60.

The spelling of 864436666443 in words is "eight hundred sixty-four billion, four hundred thirty-six million, six hundred sixty-six thousand, four hundred forty-three".