944491713921 has 96 divisors (see below), whose sum is σ = 1725491289600. Its totient is φ = 485076252672.

The previous prime is 944491713899. The next prime is 944491714007. The reversal of 944491713921 is 129317194449.

It is a happy number.

944491713921 is a `hidden beast` number, since 9 + 4 + 449 + 171 + 3 + 9 + 21 = 666.

It is not a de Polignac number, because 944491713921 - 2⁵ = 944491713889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (944491713421) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15068755 + ... + 15131303.

It is an arithmetic number, because the mean of its divisors is an integer number (17973867600).

Almost surely, 2^944491713921 is an apocalyptic number.

It is an amenable number.

944491713921 is a deficient number, since it is larger than the sum of its proper divisors (780999575679).

944491713921 is a wasteful number, since it uses less digits than its factorization.

944491713921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63215 (or 63212 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 944491713921 in words is "nine hundred forty-four billion, four hundred ninety-one million, seven hundred thirteen thousand, nine hundred twenty-one".