12147965280 has 240 divisors, whose sum is σ = 46770215184. Its totient is φ = 2944926720.

The previous prime is 12147965279. The next prime is 12147965287. The reversal of 12147965280 is 8256974121.

12147965280 is a `hidden beast` number, since 121 + 479 + 6 + 52 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12147965287) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 99954 + ... + 185166.

Almost surely, 2^12147965280 is an apocalyptic number.

12147965280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12147965280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23385107592).

12147965280 is an abundant number, since it is smaller than the sum of its proper divisors (34622249904).

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

12147965280 is a wasteful number, since it uses less digits than its factorization.

12147965280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85251 (or 85234 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 12147965280 in words is "twelve billion, one hundred forty-seven million, nine hundred sixty-five thousand, two hundred eighty".