1944918659 has 4 divisors (see below), whose sum is σ = 1951940304. Its totient is φ = 1937897016.

The previous prime is 1944918649. The next prime is 1944918671. The reversal of 1944918659 is 9568194491.

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 1944918659 - 2¹⁶ = 1944853123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1944918629) 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, 3510407 + ... + 3510960.

It is an arithmetic number, because the mean of its divisors is an integer number (487985076).

Almost surely, 2^1944918659 is an apocalyptic number.

1944918659 is a deficient number, since it is larger than the sum of its proper divisors (7021645).

1944918659 is an equidigital number, since it uses as much as digits as its factorization.

1944918659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7021644.

The product of its digits is 2799360, while the sum is 56.

The square root of 1944918659 is about 44101.2319442439. The cubic root of 1944918659 is about 1248.2468562591.

The spelling of 1944918659 in words is "one billion, nine hundred forty-four million, nine hundred eighteen thousand, six hundred fifty-nine".