16121542616 has 32 divisors (see below), whose sum is σ = 31089054000. Its totient is φ = 7831748736.

The previous prime is 16121542607. The next prime is 16121542631. The reversal of 16121542616 is 61624512161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171455 + ... + 248273.

Almost surely, 2^16121542616 is an apocalyptic number.

It is an amenable number.

16121542616 is a deficient number, since it is larger than the sum of its proper divisors (14967511384).

16121542616 is a wasteful number, since it uses less digits than its factorization.

16121542616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77571 (or 77567 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The spelling of 16121542616 in words is "sixteen billion, one hundred twenty-one million, five hundred forty-two thousand, six hundred sixteen".