1944426625 has 8 divisors (see below), whose sum is σ = 2426644584. Its totient is φ = 1555541200.

The previous prime is 1944426623. The next prime is 1944426637. The reversal of 1944426625 is 5266244491.

It can be written as a sum of positive squares in 4 ways, for example, as 158180929 + 1786245696 = 12577^2 + 42264^2 .

It is not a de Polignac number, because 1944426625 - 2¹ = 1944426623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1944426623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7777582 + ... + 7777831.

It is an arithmetic number, because the mean of its divisors is an integer number (303330573).

Almost surely, 2^1944426625 is an apocalyptic number.

It is an amenable number.

1944426625 is a deficient number, since it is larger than the sum of its proper divisors (482217959).

1944426625 is an equidigital number, since it uses as much as digits as its factorization.

1944426625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15555428 (or 15555418 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The square root of 1944426625 is about 44095.6531304391. The cubic root of 1944426625 is about 1248.1415850711.

The spelling of 1944426625 in words is "one billion, nine hundred forty-four million, four hundred twenty-six thousand, six hundred twenty-five".