12645642290 has 16 divisors (see below), whose sum is σ = 22763607768. Its totient is φ = 5057934336.

The previous prime is 12645642283. The next prime is 12645642313. The reversal of 12645642290 is 9224654621.

12645642290 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8518736209 + 4126906081 = 92297^2 + 64241^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183464 + ... + 242796.

Almost surely, 2^12645642290 is an apocalyptic number.

12645642290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12645642290 is a deficient number, since it is larger than the sum of its proper divisors (10117965478).

12645642290 is a wasteful number, since it uses less digits than its factorization.

12645642290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80653.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 12645642290 in words is "twelve billion, six hundred forty-five million, six hundred forty-two thousand, two hundred ninety".