16121620104 has 32 divisors (see below), whose sum is σ = 40307900640. Its totient is φ = 5373360000.

The previous prime is 16121620051. The next prime is 16121620147. The reversal of 16121620104 is 40102612161.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 290604 + ... + 341604.

It is an arithmetic number, because the mean of its divisors is an integer number (1259621895).

Almost surely, 2^16121620104 is an apocalyptic number.

It is an amenable number.

16121620104 is an abundant number, since it is smaller than the sum of its proper divisors (24186280536).

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

16121620104 is a wasteful number, since it uses less digits than its factorization.

16121620104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64181 (or 64177 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 16121620104 in words is "sixteen billion, one hundred twenty-one million, six hundred twenty thousand, one hundred four".