1345440231136 has 96 divisors (see below), whose sum is σ = 2975511490560. Its totient is φ = 595101136896.

The previous prime is 1345440231133. The next prime is 1345440231137. The reversal of 1345440231136 is 6311320445431.

It is a junction number, because it is equal to n+sod(n) for n = 1345440231095 and 1345440231104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345440231133) 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, 800191 + ... + 1825153.

It is an arithmetic number, because the mean of its divisors is an integer number (30994911360).

Almost surely, 2^{1345440231136} is an apocalyptic number.

1345440231136 is a gapful number since it is divisible by the number (16) 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 1345440231136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1487755745280).

1345440231136 is an abundant number, since it is smaller than the sum of its proper divisors (1630071259424).

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

1345440231136 is a wasteful number, since it uses less digits than its factorization.

1345440231136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025136 (or 1025128 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 1345440231136 its reverse (6311320445431), we get a palindrome (7656760676567).

The spelling of 1345440231136 in words is "one trillion, three hundred forty-five billion, four hundred forty million, two hundred thirty-one thousand, one hundred thirty-six".