138135651 has 16 divisors (see below), whose sum is σ = 189446400. Its totient is φ = 89480160.

The previous prime is 138135619. The next prime is 138135667. The reversal of 138135651 is 156531831.

It is not a de Polignac number, because 138135651 - 2⁵ = 138135619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138135691) 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 15 ways as a sum of consecutive naturals, for example, 22981 + ... + 28361.

It is an arithmetic number, because the mean of its divisors is an integer number (11840400).

Almost surely, 2^138135651 is an apocalyptic number.

138135651 is a deficient number, since it is larger than the sum of its proper divisors (51310749).

138135651 is a wasteful number, since it uses less digits than its factorization.

138135651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5626.

The product of its digits is 10800, while the sum is 33.

The square root of 138135651 is about 11753.1123962974. The cubic root of 138135651 is about 516.9341926822.

The spelling of 138135651 in words is "one hundred thirty-eight million, one hundred thirty-five thousand, six hundred fifty-one".