138647746332 has 120 divisors (see below), whose sum is σ = 379785665952. Its totient is φ = 44022528000.

The previous prime is 138647746331. The next prime is 138647746403. The reversal of 138647746332 is 233647746831.

138647746332 is a `hidden beast` number, since 1 + 3 + 86 + 4 + 77 + 463 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138647746331) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1757332 + ... + 1834532.

Almost surely, 2^138647746332 is an apocalyptic number.

138647746332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138647746332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189892832976).

138647746332 is an abundant number, since it is smaller than the sum of its proper divisors (241137919620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138647746332 is a wasteful number, since it uses less digits than its factorization.

138647746332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77481 (or 77470 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 54.

It can be divided in two parts, 1386477 and 46332, that added together give a square (1432809 = 1197²).

The spelling of 138647746332 in words is "one hundred thirty-eight billion, six hundred forty-seven million, seven hundred forty-six thousand, three hundred thirty-two".