16153681 has 4 divisors (see below), whose sum is σ = 16529392. Its totient is φ = 15777972.

The previous prime is 16153679. The next prime is 16153693. The reversal of 16153681 is 18635161.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18635161 = 37 ⋅503653.

It is a cyclic number.

It is not a de Polignac number, because 16153681 - 2¹ = 16153679 is a prime.

It is a super-2 number, since 2×16153681² = 521882819699522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (16153601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187791 + ... + 187876.

It is an arithmetic number, because the mean of its divisors is an integer number (4132348).

Almost surely, 2^16153681 is an apocalyptic number.

It is an amenable number.

16153681 is a deficient number, since it is larger than the sum of its proper divisors (375711).

16153681 is an equidigital number, since it uses as much as digits as its factorization.

16153681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375710.

The product of its digits is 4320, while the sum is 31.

The square root of 16153681 is about 4019.1642166003. The cubic root of 16153681 is about 252.7884153296.

The spelling of 16153681 in words is "sixteen million, one hundred fifty-three thousand, six hundred eighty-one".