16138655381 has 16 divisors (see below), whose sum is σ = 17194191168. Its totient is φ = 15126652800.

The previous prime is 16138655371. The next prime is 16138655389. The reversal of 16138655381 is 18355683161.

16138655381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 16138655381 - 2¹⁸ = 16138393237 is a prime.

It is a super-2 number, since 2×16138655381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16138655389) 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 15 ways as a sum of consecutive naturals, for example, 32510 + ... + 182576.

It is an arithmetic number, because the mean of its divisors is an integer number (1074636948).

Almost surely, 2^16138655381 is an apocalyptic number.

It is an amenable number.

16138655381 is a deficient number, since it is larger than the sum of its proper divisors (1055535787).

16138655381 is a wasteful number, since it uses less digits than its factorization.

16138655381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150212.

The product of its digits is 518400, while the sum is 47.

The spelling of 16138655381 in words is "sixteen billion, one hundred thirty-eight million, six hundred fifty-five thousand, three hundred eighty-one".