16138651 has 4 divisors (see below), whose sum is σ = 16232112. Its totient is φ = 16045192.

The previous prime is 16138613. The next prime is 16138667. The reversal of 16138651 is 15683161.

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

It is a cyclic number.

It is not a de Polignac number, because 16138651 - 2⁷ = 16138523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16138601) 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, 46471 + ... + 46816.

It is an arithmetic number, because the mean of its divisors is an integer number (4058028).

Almost surely, 2^16138651 is an apocalyptic number.

16138651 is a deficient number, since it is larger than the sum of its proper divisors (93461).

16138651 is an equidigital number, since it uses as much as digits as its factorization.

16138651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93460.

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

The square root of 16138651 is about 4017.2939897399. The cubic root of 16138651 is about 252.7099896783.

The spelling of 16138651 in words is "sixteen million, one hundred thirty-eight thousand, six hundred fifty-one".