16485477381 has 12 divisors (see below), whose sum is σ = 23945388480. Its totient is φ = 10928918760.

The previous prime is 16485477377. The next prime is 16485477413. The reversal of 16485477381 is 18377458461.

16485477381 is a `hidden beast` number, since 1 + 64 + 8 + 547 + 7 + 38 + 1 = 666.

16485477381 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 16485477381 - 2² = 16485477377 is a prime.

It is a super-2 number, since 2×16485477381² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16485477331) 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 11 ways as a sum of consecutive naturals, for example, 5114925 + ... + 5118146.

It is an arithmetic number, because the mean of its divisors is an integer number (1995449040).

Almost surely, 2^16485477381 is an apocalyptic number.

It is an amenable number.

16485477381 is a deficient number, since it is larger than the sum of its proper divisors (7459911099).

16485477381 is a wasteful number, since it uses less digits than its factorization.

16485477381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10233256 (or 10233253 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The spelling of 16485477381 in words is "sixteen billion, four hundred eighty-five million, four hundred seventy-seven thousand, three hundred eighty-one".