16121601617 has 12 divisors (see below), whose sum is σ = 17730359808. Its totient is φ = 14647795800.

The previous prime is 16121601589. The next prime is 16121601637. The reversal of 16121601617 is 71610612161.

It is not a de Polignac number, because 16121601617 - 2¹² = 16121597521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16121601637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185168 + ... + 257934.

It is an arithmetic number, because the mean of its divisors is an integer number (1477529984).

Almost surely, 2^16121601617 is an apocalyptic number.

It is an amenable number.

16121601617 is a deficient number, since it is larger than the sum of its proper divisors (1608758191).

16121601617 is a wasteful number, since it uses less digits than its factorization.

16121601617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74620 (or 74609 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 32.

The spelling of 16121601617 in words is "sixteen billion, one hundred twenty-one million, six hundred one thousand, six hundred seventeen".