16156621105 has 8 divisors (see below), whose sum is σ = 19399300200. Its totient is φ = 12917726976.

The previous prime is 16156621099. The next prime is 16156621127. The reversal of 16156621105 is 50112665161.

It can be written as a sum of positive squares in 4 ways, for example, as 4231762704 + 11924858401 = 65052^2 + 109201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16156621105 - 2¹⁷ = 16156490033 is a prime.

It is a super-2 number, since 2×16156621105² (a number of 21 digits) contains 22 as substring.

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, 936840 + ... + 953929.

It is an arithmetic number, because the mean of its divisors is an integer number (2424912525).

Almost surely, 2^16156621105 is an apocalyptic number.

It is an amenable number.

16156621105 is a deficient number, since it is larger than the sum of its proper divisors (3242679095).

16156621105 is a wasteful number, since it uses less digits than its factorization.

16156621105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892483.

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 16156621105 in words is "sixteen billion, one hundred fifty-six million, six hundred twenty-one thousand, one hundred five".