1944532689157 has 4 divisors (see below), whose sum is σ = 1950666861996. Its totient is φ = 1938398516320.

The previous prime is 1944532689107. The next prime is 1944532689181. The reversal of 1944532689157 is 7519862354491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1006422278436 + 938110410721 = 1003206^2 + 968561^2 .

It is a cyclic number.

It is not a de Polignac number, because 1944532689157 - 2³⁵ = 1910172950789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1944532689107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3067085944 + ... + 3067086577.

It is an arithmetic number, because the mean of its divisors is an integer number (487666715499).

Almost surely, 2^{1944532689157} is an apocalyptic number.

It is an amenable number.

1944532689157 is a deficient number, since it is larger than the sum of its proper divisors (6134172839).

1944532689157 is an equidigital number, since it uses as much as digits as its factorization.

1944532689157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6134172838.

The product of its digits is 65318400, while the sum is 64.

The spelling of 1944532689157 in words is "one trillion, nine hundred forty-four billion, five hundred thirty-two million, six hundred eighty-nine thousand, one hundred fifty-seven".