16055781 has 24 divisors (see below), whose sum is σ = 25061760. Its totient is φ = 9116352.

The previous prime is 16055773. The next prime is 16055801. The reversal of 16055781 is 18755061.

It is not a de Polignac number, because 16055781 - 2³ = 16055773 is a prime.

It is a super-2 number, since 2×16055781² = 515576207039922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16055681) 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 23 ways as a sum of consecutive naturals, for example, 34905 + ... + 35361.

It is an arithmetic number, because the mean of its divisors is an integer number (1044240).

Almost surely, 2^16055781 is an apocalyptic number.

It is an amenable number.

16055781 is a deficient number, since it is larger than the sum of its proper divisors (9005979).

16055781 is a wasteful number, since it uses less digits than its factorization.

16055781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 16055781 is about 4006.9665583830. The cubic root of 16055781 is about 252.2767022357.

It can be divided in two parts, 16055 and 781, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 16055781 in words is "sixteen million, fifty-five thousand, seven hundred eighty-one".