1138439667072 has 128 divisors (see below), whose sum is σ = 3118902796800. Its totient is φ = 367727974400.

The previous prime is 1138439667031. The next prime is 1138439667077. The reversal of 1138439667072 is 2707669348311.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138439667077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1510579 + ... + 2135117.

It is an arithmetic number, because the mean of its divisors is an integer number (24366428100).

Almost surely, 2^{1138439667072} is an apocalyptic number.

1138439667072 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 1138439667072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1559451398400).

1138439667072 is an abundant number, since it is smaller than the sum of its proper divisors (1980463129728).

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

1138439667072 is a wasteful number, since it uses less digits than its factorization.

1138439667072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624704 (or 624692 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 57.

The spelling of 1138439667072 in words is "one trillion, one hundred thirty-eight billion, four hundred thirty-nine million, six hundred sixty-seven thousand, seventy-two".