16121043044 has 24 divisors (see below), whose sum is σ = 29554089600. Its totient is φ = 7684054560.

The previous prime is 16121043023. The next prime is 16121043049. The reversal of 16121043044 is 44034012161.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (16121043049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 870422 + ... + 888749.

It is an arithmetic number, because the mean of its divisors is an integer number (1231420400).

Almost surely, 2^16121043044 is an apocalyptic number.

It is an amenable number.

16121043044 is a deficient number, since it is larger than the sum of its proper divisors (13433046556).

16121043044 is a wasteful number, since it uses less digits than its factorization.

16121043044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759283 (or 1759281 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The spelling of 16121043044 in words is "sixteen billion, one hundred twenty-one million, forty-three thousand, forty-four".