12844566639970 has 64 divisors (see below), whose sum is σ = 25511057399520. Its totient is φ = 4626015436800.

The previous prime is 12844566639923. The next prime is 12844566639979. The reversal of 12844566639970 is 7993666544821.

It can be written as a sum of positive squares in 16 ways, for example, as 5422140445401 + 7422426194569 = 2328549^2 + 2724413^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12844566639970.

It is not an unprimeable number, because it can be changed into a prime (12844566639979) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26844586 + ... + 27318874.

It is a 2-persistent number, because it is pandigital, and so is 2⋅12844566639970 = 25689133279940, but 3⋅12844566639970 = 38533699919910 is not.

Almost surely, 2^{12844566639970} is an apocalyptic number.

12844566639970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12844566639970 is a deficient number, since it is larger than the sum of its proper divisors (12666490759550).

12844566639970 is a wasteful number, since it uses less digits than its factorization.

12844566639970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479431.

The product of its (nonzero) digits is 470292480, while the sum is 70.

The spelling of 12844566639970 in words is "twelve trillion, eight hundred forty-four billion, five hundred sixty-six million, six hundred thirty-nine thousand, nine hundred seventy".