12640270225 has 48 divisors (see below), whose sum is σ = 17809324416. Its totient is φ = 8817984000.

The previous prime is 12640270199. The next prime is 12640270231. The reversal of 12640270225 is 52207204621.

It is not a de Polignac number, because 12640270225 - 2⁹ = 12640269713 is a prime.

It is a super-2 number, since 2×12640270225² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 713677 + ... + 731173.

It is an arithmetic number, because the mean of its divisors is an integer number (371027592).

Almost surely, 2^12640270225 is an apocalyptic number.

It is an amenable number.

12640270225 is a deficient number, since it is larger than the sum of its proper divisors (5169054191).

12640270225 is a wasteful number, since it uses less digits than its factorization.

12640270225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17626 (or 17621 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 12640270225 its reverse (52207204621), we get a palindrome (64847474846).

The spelling of 12640270225 in words is "twelve billion, six hundred forty million, two hundred seventy thousand, two hundred twenty-five".