1944571963201 has 4 divisors (see below), whose sum is σ = 2222367957952. Its totient is φ = 1666775968452.

The previous prime is 1944571963193. The next prime is 1944571963223. The reversal of 1944571963201 is 1023691754491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1944571963201 - 2³ = 1944571963193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1944571963291) 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 3 ways as a sum of consecutive naturals, for example, 138897997365 + ... + 138897997378.

It is an arithmetic number, because the mean of its divisors is an integer number (555591989488).

Almost surely, 2^{1944571963201} is an apocalyptic number.

It is an amenable number.

1944571963201 is a deficient number, since it is larger than the sum of its proper divisors (277795994751).

1944571963201 is an equidigital number, since it uses as much as digits as its factorization.

1944571963201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277795994750.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 1944571963201 in words is "one trillion, nine hundred forty-four billion, five hundred seventy-one million, nine hundred sixty-three thousand, two hundred one".