1944425641 has 8 divisors (see below), whose sum is σ = 1959667904. Its totient is φ = 1929214800.

The previous prime is 1944425551. The next prime is 1944425671. The reversal of 1944425641 is 1465244491.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1944425641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1944425594 and 1944425603.

It is not an unprimeable number, because it can be changed into a prime (1944425671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125086 + ... + 139768.

It is an arithmetic number, because the mean of its divisors is an integer number (244958488).

Almost surely, 2^1944425641 is an apocalyptic number.

It is an amenable number.

1944425641 is a deficient number, since it is larger than the sum of its proper divisors (15242263).

1944425641 is a wasteful number, since it uses less digits than its factorization.

1944425641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15711.

The product of its digits is 138240, while the sum is 40.

The square root of 1944425641 is about 44095.6419728753. The cubic root of 1944425641 is about 1248.1413745255.

The spelling of 1944425641 in words is "one billion, nine hundred forty-four million, four hundred twenty-five thousand, six hundred forty-one".