138653266 has 16 divisors (see below), whose sum is σ = 216391680. Its totient is φ = 66558240.

The previous prime is 138653261. The next prime is 138653287. The reversal of 138653266 is 662356831.

It is not an unprimeable number, because it can be changed into a prime (138653261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 931 + ... + 16678.

It is an arithmetic number, because the mean of its divisors is an integer number (13524480).

Almost surely, 2^138653266 is an apocalyptic number.

138653266 is a deficient number, since it is larger than the sum of its proper divisors (77738414).

138653266 is a wasteful number, since it uses less digits than its factorization.

138653266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17769.

The product of its digits is 155520, while the sum is 40.

The square root of 138653266 is about 11775.1121438397. The cubic root of 138653266 is about 517.5790645221.

The spelling of 138653266 in words is "one hundred thirty-eight million, six hundred fifty-three thousand, two hundred sixty-six".