1944635633945 has 8 divisors (see below), whose sum is σ = 2334002838336. Its totient is φ = 1555415122096.

The previous prime is 1944635633923. The next prime is 1944635634001. The reversal of 1944635633945 is 5493365364491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1944635633945 - 2²⁴ = 1944618856729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36643967 + ... + 36696996.

It is an arithmetic number, because the mean of its divisors is an integer number (291750354792).

Almost surely, 2^{1944635633945} is an apocalyptic number.

It is an amenable number.

1944635633945 is a deficient number, since it is larger than the sum of its proper divisors (389367204391).

1944635633945 is an equidigital number, since it uses as much as digits as its factorization.

1944635633945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73346271.

The product of its digits is 125971200, while the sum is 62.

The spelling of 1944635633945 in words is "one trillion, nine hundred forty-four billion, six hundred thirty-five million, six hundred thirty-three thousand, nine hundred forty-five".