331449991389 has 64 divisors (see below), whose sum is σ = 569193799680. Its totient is φ = 188393506560.

The previous prime is 331449991357. The next prime is 331449991471. The reversal of 331449991389 is 983199944133.

331449991389 is a `hidden beast` number, since 3 + 3 + 1 + 4 + 499 + 9 + 138 + 9 = 666.

It is not a de Polignac number, because 331449991389 - 2⁵ = 331449991357 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331449991309) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1312884 + ... + 1544850.

It is an arithmetic number, because the mean of its divisors is an integer number (8893653120).

Almost surely, 2^331449991389 is an apocalyptic number.

It is an amenable number.

331449991389 is a deficient number, since it is larger than the sum of its proper divisors (237743808291).

331449991389 is a wasteful number, since it uses less digits than its factorization.

331449991389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232287 (or 232281 counting only the distinct ones).

The product of its digits is 22674816, while the sum is 63.

The spelling of 331449991389 in words is "three hundred thirty-one billion, four hundred forty-nine million, nine hundred ninety-one thousand, three hundred eighty-nine".