138612233488 has 10 divisors (see below), whose sum is σ = 268561202414. Its totient is φ = 69306116736.

The previous prime is 138612233453. The next prime is 138612233489. The reversal of 138612233488 is 884332216831.

It can be written as a sum of positive squares in only one way, i.e., 136923681024 + 1688552464 = 370032^2 + 41092^2 .

It is a super-2 number, since 2×138612233488² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138612233489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4331632281 + ... + 4331632312.

Almost surely, 2^138612233488 is an apocalyptic number.

It is an amenable number.

138612233488 is a deficient number, since it is larger than the sum of its proper divisors (129948968926).

138612233488 is an equidigital number, since it uses as much as digits as its factorization.

138612233488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8663264601 (or 8663264595 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 49.

It can be divided in two parts, 138612 and 233488, that added together give a square (372100 = 610²).

The spelling of 138612233488 in words is "one hundred thirty-eight billion, six hundred twelve million, two hundred thirty-three thousand, four hundred eighty-eight".