12620966400 has 1200 divisors, whose sum is σ = 55993487616. Its totient is φ = 2747105280.

The previous prime is 12620966333. The next prime is 12620966473. The reversal of 12620966400 is 466902621.

12620966400 is a `hidden beast` number, since 1 + 2 + 6 + 2 + 0 + 9 + 6 + 640 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1200).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 268531177 + ... + 268531223.

Almost surely, 2^12620966400 is an apocalyptic number.

12620966400 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 12620966400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27996743808).

12620966400 is an abundant number, since it is smaller than the sum of its proper divisors (43372521216).

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

12620966400 is an equidigital number, since it uses as much as digits as its factorization.

12620966400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 12620966400 in words is "twelve billion, six hundred twenty million, nine hundred sixty-six thousand, four hundred".