12445731645 has 16 divisors (see below), whose sum is σ = 20193639552. Its totient is φ = 6544233920.

The previous prime is 12445731601. The next prime is 12445731659. The reversal of 12445731645 is 54613754421.

It is not a de Polignac number, because 12445731645 - 2⁷ = 12445731517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12445731597 and 12445731606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5842002 + ... + 5844131.

It is an arithmetic number, because the mean of its divisors is an integer number (1262102472).

Almost surely, 2^12445731645 is an apocalyptic number.

12445731645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12445731645 is a deficient number, since it is larger than the sum of its proper divisors (7747907907).

12445731645 is a wasteful number, since it uses less digits than its factorization.

12445731645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11686212.

The product of its digits is 403200, while the sum is 42.

The spelling of 12445731645 in words is "twelve billion, four hundred forty-five million, seven hundred thirty-one thousand, six hundred forty-five".