12640000265 has 8 divisors (see below), whose sum is σ = 15194945088. Its totient is φ = 10094037040.

The previous prime is 12640000253. The next prime is 12640000337. The reversal of 12640000265 is 56200004621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12640000265 - 2¹² = 12639996169 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2242301 + ... + 2247930.

It is an arithmetic number, because the mean of its divisors is an integer number (1899368136).

Almost surely, 2^12640000265 is an apocalyptic number.

It is an amenable number.

12640000265 is a deficient number, since it is larger than the sum of its proper divisors (2554944823).

12640000265 is an equidigital number, since it uses as much as digits as its factorization.

12640000265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4490799.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 12640000265 its reverse (56200004621), we get a palindrome (68840004886).

The spelling of 12640000265 in words is "twelve billion, six hundred forty million, two hundred sixty-five", and thus it is an aban number.