16121560044 has 24 divisors (see below), whose sum is σ = 38830425088. Its totient is φ = 5200503120.

The previous prime is 16121560019. The next prime is 16121560067. The reversal of 16121560044 is 44006512161.

It is a junction number, because it is equal to n+sod(n) for n = 16121559993 and 16121560020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21668392 + ... + 21669135.

Almost surely, 2^16121560044 is an apocalyptic number.

It is an amenable number.

16121560044 is an abundant number, since it is smaller than the sum of its proper divisors (22708865044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16121560044 is a wasteful number, since it uses less digits than its factorization.

16121560044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43337565 (or 43337563 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 16121560044 in words is "sixteen billion, one hundred twenty-one million, five hundred sixty thousand, forty-four".