1944120137123 has 4 divisors (see below), whose sum is σ = 1950755359728. Its totient is φ = 1937484914520.

The previous prime is 1944120137119. The next prime is 1944120137131. The reversal of 1944120137123 is 3217310214491.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1944120137123 - 2² = 1944120137119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1944120137153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3317610863 + ... + 3317611448.

It is an arithmetic number, because the mean of its divisors is an integer number (487688839932).

Almost surely, 2^{1944120137123} is an apocalyptic number.

1944120137123 is a deficient number, since it is larger than the sum of its proper divisors (6635222605).

1944120137123 is an equidigital number, since it uses as much as digits as its factorization.

1944120137123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6635222604.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 1944120137123 in words is "one trillion, nine hundred forty-four billion, one hundred twenty million, one hundred thirty-seven thousand, one hundred twenty-three".