13220504544 has 48 divisors (see below), whose sum is σ = 37373352912. Its totient is φ = 4067847168.

The previous prime is 13220504483. The next prime is 13220504567. The reversal of 13220504544 is 44540502231.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5295429 + ... + 5297924.

It is an arithmetic number, because the mean of its divisors is an integer number (778611519).

Almost surely, 2^13220504544 is an apocalyptic number.

It is an amenable number.

13220504544 is an abundant number, since it is smaller than the sum of its proper divisors (24152848368).

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

13220504544 is a wasteful number, since it uses less digits than its factorization.

13220504544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10593379 (or 10593371 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The spelling of 13220504544 in words is "thirteen billion, two hundred twenty million, five hundred four thousand, five hundred forty-four".