12444445690 has 32 divisors (see below), whose sum is σ = 23173424784. Its totient is φ = 4807872000.

The previous prime is 12444445681. The next prime is 12444445729. The reversal of 12444445690 is 9654444421.

It can be written as a sum of positive squares in 8 ways, for example, as 4716805041 + 7727640649 = 68679^2 + 87907^2 .

It is a super-2 number, since 2×12444445690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72061 + ... + 173440.

Almost surely, 2^12444445690 is an apocalyptic number.

12444445690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12444445690 is a deficient number, since it is larger than the sum of its proper divisors (10728979094).

12444445690 is a wasteful number, since it uses less digits than its factorization.

12444445690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245682.

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 12444445690 in words is "twelve billion, four hundred forty-four million, four hundred forty-five thousand, six hundred ninety".