1305423140432 has 60 divisors (see below), whose sum is σ = 2696779565820. Its totient is φ = 612032483328.

The previous prime is 1305423140393. The next prime is 1305423140443. The reversal of 1305423140432 is 2340413245031.

It can be written as a sum of positive squares in 6 ways, for example, as 147698787856 + 1157724352576 = 384316^2 + 1075976^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 719108 + ... + 1768604.

It is an arithmetic number, because the mean of its divisors is an integer number (44946326097).

Almost surely, 2^{1305423140432} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1305423140432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1348389782910).

1305423140432 is an abundant number, since it is smaller than the sum of its proper divisors (1391356425388).

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

1305423140432 is a wasteful number, since it uses less digits than its factorization.

1305423140432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049808 (or 1049785 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 1305423140432 its reverse (2340413245031), we get a palindrome (3645836385463).

The spelling of 1305423140432 in words is "one trillion, three hundred five billion, four hundred twenty-three million, one hundred forty thousand, four hundred thirty-two".