12978211360 has 24 divisors (see below), whose sum is σ = 30661024716. Its totient is φ = 5191284480.

The previous prime is 12978211327. The next prime is 12978211387. The reversal of 12978211360 is 6311287921.

It can be written as a sum of positive squares in 2 ways, for example, as 12953171344 + 25040016 = 113812^2 + 5004^2 .

It is a super-3 number, since 3×12978211360³ (a number of 31 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40556751 + ... + 40557070.

Almost surely, 2^12978211360 is an apocalyptic number.

12978211360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12978211360 is an abundant number, since it is smaller than the sum of its proper divisors (17682813356).

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

12978211360 is an equidigital number, since it uses as much as digits as its factorization.

12978211360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81113836 (or 81113828 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 12978211360 in words is "twelve billion, nine hundred seventy-eight million, two hundred eleven thousand, three hundred sixty".