16081557 has 4 divisors (see below), whose sum is σ = 21442080. Its totient is φ = 10721036.

The previous prime is 16081547. The next prime is 16081579. The reversal of 16081557 is 75518061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16081557 - 2¹¹ = 16079509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16081537) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2680257 + ... + 2680262.

It is an arithmetic number, because the mean of its divisors is an integer number (5360520).

Almost surely, 2^16081557 is an apocalyptic number.

It is an amenable number.

16081557 is a deficient number, since it is larger than the sum of its proper divisors (5360523).

16081557 is an equidigital number, since it uses as much as digits as its factorization.

16081557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5360522.

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

The square root of 16081557 is about 4010.1816667079. The cubic root of 16081557 is about 252.4116319861.

The spelling of 16081557 in words is "sixteen million, eighty-one thousand, five hundred fifty-seven".