12155503504 has 45 divisors (see below), whose sum is σ = 24149404209. Its totient is φ = 5927147520.

The previous prime is 12155503487. The next prime is 12155503543. The reversal of 12155503504 is 40530555121.

The square root of 12155503504 is 110252.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10972143504 + 1183360000 = 104748^2 + 34400^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18963024 + ... + 18963664.

Almost surely, 2^12155503504 is an apocalyptic number.

12155503504 is the 110252-nd square number.

It is an amenable number.

12155503504 is a deficient number, since it is larger than the sum of its proper divisors (11993900705).

12155503504 is an frugal number, since it uses more digits than its factorization.

12155503504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 12155503504 in words is "twelve billion, one hundred fifty-five million, five hundred three thousand, five hundred four".