15423520432128 has 224 divisors, whose sum is σ = 41926500713760. Its totient is φ = 5041721180160.

The previous prime is 15423520432123. The next prime is 15423520432139. The reversal of 15423520432128 is 82123402532451.

It is a self number, because there is not a number n which added to its sum of digits gives 15423520432128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15423520432121) 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, 505193568 + ... + 505224096.

Almost surely, 2^{15423520432128} 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 15423520432128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20963250356880).

15423520432128 is an abundant number, since it is smaller than the sum of its proper divisors (26502980281632).

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

15423520432128 is an equidigital number, since it uses as much as digits as its factorization.

15423520432128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30956 (or 30932 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 42.

Adding to 15423520432128 its reverse (82123402532451), we get a palindrome (97546922964579).

The spelling of 15423520432128 in words is "fifteen trillion, four hundred twenty-three billion, five hundred twenty million, four hundred thirty-two thousand, one hundred twenty-eight".