15504044603413 has 12 divisors (see below), whose sum is σ = 15927430563468. Its totient is φ = 15090360238400.

The previous prime is 15504044603401. The next prime is 15504044603429. The reversal of 15504044603413 is 31430644040551.

It can be written as a sum of positive squares in 2 ways, for example, as 13646869823889 + 1857174779524 = 3694167^2 + 1362782^2 .

It is not a de Polignac number, because 15504044603413 - 2³³ = 15495454668821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15504044609413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21697456 + ... + 22400617.

It is an arithmetic number, because the mean of its divisors is an integer number (1327285880289).

Almost surely, 2^{15504044603413} is an apocalyptic number.

It is an amenable number.

15504044603413 is a deficient number, since it is larger than the sum of its proper divisors (423385960055).

15504044603413 is an equidigital number, since it uses as much as digits as its factorization.

15504044603413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44098292 (or 44098233 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

Adding to 15504044603413 its reverse (31430644040551), we get a palindrome (46934688643964).

The spelling of 15504044603413 in words is "fifteen trillion, five hundred four billion, forty-four million, six hundred three thousand, four hundred thirteen".