12015205504 has 32 divisors (see below), whose sum is σ = 23943689100. Its totient is φ = 6005809152.

The previous prime is 12015205493. The next prime is 12015205507. The reversal of 12015205504 is 40550251021.

It can be written as a sum of positive squares in 2 ways, for example, as 11431886400 + 583319104 = 106920^2 + 24152^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (12015205507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485724 + ... + 509860.

Almost surely, 2^12015205504 is an apocalyptic number.

It is an amenable number.

12015205504 is a deficient number, since it is larger than the sum of its proper divisors (11928483596).

12015205504 is an equidigital number, since it uses as much as digits as its factorization.

12015205504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28040 (or 28028 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 12015205504 its reverse (40550251021), we get a palindrome (52565456525).

The spelling of 12015205504 in words is "twelve billion, fifteen million, two hundred five thousand, five hundred four".