16161261255 has 48 divisors (see below), whose sum is σ = 28684340256. Its totient is φ = 8413009920.

The previous prime is 16161261251. The next prime is 16161261289. The reversal of 16161261255 is 55216216161.

16161261255 is a `hidden beast` number, since 1 + 616 + 1 + 26 + 12 + 5 + 5 = 666.

16161261255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16161261255 - 2² = 16161261251 is a prime.

It is a super-2 number, since 2×16161261255² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16161261251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4876479 + ... + 4879791.

It is an arithmetic number, because the mean of its divisors is an integer number (597590422).

Almost surely, 2^16161261255 is an apocalyptic number.

16161261255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16161261255 is a deficient number, since it is larger than the sum of its proper divisors (12523079001).

16161261255 is a wasteful number, since it uses less digits than its factorization.

16161261255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5888 (or 5885 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The spelling of 16161261255 in words is "sixteen billion, one hundred sixty-one million, two hundred sixty-one thousand, two hundred fifty-five".