1944387711969 has 16 divisors (see below), whose sum is σ = 2658963124224. Its totient is φ = 1263175275600.

The previous prime is 1944387711961. The next prime is 1944387711977. The reversal of 1944387711969 is 9691177834491.

It is an interprime number because it is at equal distance from previous prime (1944387711961) and next prime (1944387711977).

It is not a de Polignac number, because 1944387711969 - 2³ = 1944387711961 is a prime.

It is a super-2 number, since 2×1944387711969² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1944387711961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17430217 + ... + 17541414.

It is an arithmetic number, because the mean of its divisors is an integer number (166185195264).

Almost surely, 2^{1944387711969} is an apocalyptic number.

It is an amenable number.

1944387711969 is a deficient number, since it is larger than the sum of its proper divisors (714575412255).

1944387711969 is a wasteful number, since it uses less digits than its factorization.

1944387711969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34972108.

The product of its digits is 82301184, while the sum is 69.

The spelling of 1944387711969 in words is "one trillion, nine hundred forty-four billion, three hundred eighty-seven million, seven hundred eleven thousand, nine hundred sixty-nine".