138262421252 has 12 divisors (see below), whose sum is σ = 248498676300. Its totient is φ = 67262799456.

The previous prime is 138262421243. The next prime is 138262421291. The reversal of 138262421252 is 252124262831.

It can be written as a sum of positive squares in 2 ways, for example, as 61719452356 + 76542968896 = 248434^2 + 276664^2 .

It is an unprimeable number.

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, 467102627 + ... + 467102922.

It is an arithmetic number, because the mean of its divisors is an integer number (20708223025).

Almost surely, 2^138262421252 is an apocalyptic number.

It is an amenable number.

138262421252 is a deficient number, since it is larger than the sum of its proper divisors (110236255048).

138262421252 is a wasteful number, since it uses less digits than its factorization.

138262421252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934205590 (or 934205588 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The spelling of 138262421252 in words is "one hundred thirty-eight billion, two hundred sixty-two million, four hundred twenty-one thousand, two hundred fifty-two".