16148681 has 4 divisors (see below), whose sum is σ = 16230852. Its totient is φ = 16066512.

The previous prime is 16148663. The next prime is 16148707. The reversal of 16148681 is 18684161.

It is a happy number.

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 10465225 + 5683456 = 3235^2 + 2384^2 .

It is a cyclic number.

It is not a de Polignac number, because 16148681 - 2⁶ = 16148617 is a prime.

It is a super-2 number, since 2×16148681² = 521559796079522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16148611) 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, 40790 + ... + 41183.

It is an arithmetic number, because the mean of its divisors is an integer number (4057713).

Almost surely, 2^16148681 is an apocalyptic number.

It is an amenable number.

16148681 is a deficient number, since it is larger than the sum of its proper divisors (82171).

16148681 is an equidigital number, since it uses as much as digits as its factorization.

16148681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82170.

The product of its digits is 9216, while the sum is 35.

The square root of 16148681 is about 4018.5421485907. The cubic root of 16148681 is about 252.7623310271.

The spelling of 16148681 in words is "sixteen million, one hundred forty-eight thousand, six hundred eighty-one".