1945944184609 has 12 divisors (see below), whose sum is σ = 2068002981648. Its totient is φ = 1830716590400.

The previous prime is 1945944184589. The next prime is 1945944184619. The reversal of 1945944184609 is 9064814495491.

It is not a de Polignac number, because 1945944184609 - 2⁵ = 1945944184577 is a prime.

It is a super-2 number, since 2×1945944184609² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1945944184619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 699607 + ... + 2093164.

It is an arithmetic number, because the mean of its divisors is an integer number (172333581804).

Almost surely, 2^{1945944184609} is an apocalyptic number.

It is an amenable number.

1945944184609 is a deficient number, since it is larger than the sum of its proper divisors (122058797039).

1945944184609 is a wasteful number, since it uses less digits than its factorization.

1945944184609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2795216 (or 2795199 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 64.

The spelling of 1945944184609 in words is "one trillion, nine hundred forty-five billion, nine hundred forty-four million, one hundred eighty-four thousand, six hundred nine".