15504243410040 has 256 divisors, whose sum is σ = 58003541406720. Its totient is φ = 3220902973440.

The previous prime is 15504243410039. The next prime is 15504243410077. The reversal of 15504243410040 is 4001434240551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 15504243409983 and 15504243410010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39509034 + ... + 39899526.

It is an arithmetic number, because the mean of its divisors is an integer number (226576333620).

Almost surely, 2^{15504243410040} is an apocalyptic number.

15504243410040 is a gapful number since it is divisible by the number (10) 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 15504243410040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29001770703360).

15504243410040 is an abundant number, since it is smaller than the sum of its proper divisors (42499297996680).

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

15504243410040 is a wasteful number, since it uses less digits than its factorization.

15504243410040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394822 (or 394818 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 15504243410040 its reverse (4001434240551), we get a palindrome (19505677650591).

The spelling of 15504243410040 in words is "fifteen trillion, five hundred four billion, two hundred forty-three million, four hundred ten thousand, forty".