12635520320 has 28 divisors (see below), whose sum is σ = 30088333524. Its totient is φ = 5054208000.

The previous prime is 12635520311. The next prime is 12635520367. The reversal of 12635520320 is 2302553621.

It can be written as a sum of positive squares in 2 ways, for example, as 5915455744 + 6720064576 = 76912^2 + 81976^2 .

It is a congruent number.

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, 19742681 + ... + 19743320.

Almost surely, 2^12635520320 is an apocalyptic number.

12635520320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12635520320 is an abundant number, since it is smaller than the sum of its proper divisors (17452813204).

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

12635520320 is an equidigital number, since it uses as much as digits as its factorization.

12635520320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39486018 (or 39486008 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 12635520320 in words is "twelve billion, six hundred thirty-five million, five hundred twenty thousand, three hundred twenty".