12005078688 has 84 divisors (see below), whose sum is σ = 35436356298. Its totient is φ = 4001685120.

The previous prime is 12005078663. The next prime is 12005078713. The reversal of 12005078688 is 88687050021.

It is an interprime number because it is at equal distance from previous prime (12005078663) and next prime (12005078713).

It can be written as a sum of positive squares in only one way, i.e., 10727159184 + 1277919504 = 103572^2 + 35748^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 233983 + ... + 280638.

Almost surely, 2^12005078688 is an apocalyptic number.

12005078688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12005078688 is an abundant number, since it is smaller than the sum of its proper divisors (23431277610).

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

12005078688 is an frugal number, since it uses more digits than its factorization.

12005078688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514649 (or 514626 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The spelling of 12005078688 in words is "twelve billion, five million, seventy-eight thousand, six hundred eighty-eight".