16081555 has 16 divisors (see below), whose sum is σ = 22507200. Its totient is φ = 11026176.

The previous prime is 16081547. The next prime is 16081579. The reversal of 16081555 is 55518061.

It is not a de Polignac number, because 16081555 - 2³ = 16081547 is a prime.

It is a super-2 number, since 2×16081555² = 517232822436050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2974 + ... + 6403.

It is an arithmetic number, because the mean of its divisors is an integer number (1406700).

Almost surely, 2^16081555 is an apocalyptic number.

16081555 is a deficient number, since it is larger than the sum of its proper divisors (6425645).

16081555 is an frugal number, since it uses more digits than its factorization.

16081555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9403 (or 9389 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 31.

The square root of 16081555 is about 4010.1814173426. The cubic root of 16081555 is about 252.4116215223.

The spelling of 16081555 in words is "sixteen million, eighty-one thousand, five hundred fifty-five".