138235662266 has 16 divisors (see below), whose sum is σ = 223345486728. Its totient is φ = 63789153600.

The previous prime is 138235662263. The next prime is 138235662269. The reversal of 138235662266 is 662266532831.

It is an interprime number because it is at equal distance from previous prime (138235662263) and next prime (138235662269).

It can be written as a sum of positive squares in 4 ways, for example, as 126964655041 + 11271007225 = 356321^2 + 106165^2 .

It is not an unprimeable number, because it can be changed into a prime (138235662263) 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, 354125 + ... + 633936.

Almost surely, 2^138235662266 is an apocalyptic number.

138235662266 is a deficient number, since it is larger than the sum of its proper divisors (85109824462).

138235662266 is a wasteful number, since it uses less digits than its factorization.

138235662266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993457.

The product of its digits is 3732480, while the sum is 50.

The spelling of 138235662266 in words is "one hundred thirty-eight billion, two hundred thirty-five million, six hundred sixty-two thousand, two hundred sixty-six".