15520344045144 has 64 divisors (see below), whose sum is σ = 39708135350400. Its totient is φ = 5052507860736.

The previous prime is 15520344045139. The next prime is 15520344045313. The reversal of 15520344045144 is 44154044302551.

It is a super-2 number, since 2×15520344045144² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15520344045096 and 15520344045105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7418247 + ... + 9277449.

It is an arithmetic number, because the mean of its divisors is an integer number (620439614850).

Almost surely, 2^{15520344045144} is an apocalyptic number.

It is an amenable number.

15520344045144 is an abundant number, since it is smaller than the sum of its proper divisors (24187791305256).

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

15520344045144 is a wasteful number, since it uses less digits than its factorization.

15520344045144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867344 (or 1867340 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 42.

Adding to 15520344045144 its reverse (44154044302551), we get a palindrome (59674388347695).

The spelling of 15520344045144 in words is "fifteen trillion, five hundred twenty billion, three hundred forty-four million, forty-five thousand, one hundred forty-four".