16155697 has 4 divisors (see below), whose sum is σ = 16712820. Its totient is φ = 15598576.

The previous prime is 16155677. The next prime is 16155731. The reversal of 16155697 is 79655161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11895601 + 4260096 = 3449^2 + 2064^2 .

It is a cyclic number.

It is not a de Polignac number, because 16155697 - 2¹⁵ = 16122929 is a prime.

It is a super-2 number, since 2×16155697² = 522013091111618, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16155647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278518 + ... + 278575.

It is an arithmetic number, because the mean of its divisors is an integer number (4178205).

Almost surely, 2^16155697 is an apocalyptic number.

It is an amenable number.

16155697 is a deficient number, since it is larger than the sum of its proper divisors (557123).

16155697 is an equidigital number, since it uses as much as digits as its factorization.

16155697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557122.

The product of its digits is 56700, while the sum is 40.

The square root of 16155697 is about 4019.4150071870. The cubic root of 16155697 is about 252.7989309978.

The spelling of 16155697 in words is "sixteen million, one hundred fifty-five thousand, six hundred ninety-seven".