12640000265000 has 80 divisors (see below), whose sum is σ = 29668130284320. Its totient is φ = 5047018520000.

The previous prime is 12640000264973. The next prime is 12640000265029. The reversal of 12640000265000 is 56200004621.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 569885 + ... + 5060115.

It is an arithmetic number, because the mean of its divisors is an integer number (370851628554).

Almost surely, 2^{12640000265000} is an apocalyptic number.

12640000265000 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 12640000265000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14834065142160).

12640000265000 is an abundant number, since it is smaller than the sum of its proper divisors (17028130019320).

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

12640000265000 is an equidigital number, since it uses as much as digits as its factorization.

12640000265000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4490820 (or 4490801 counting only the distinct ones).

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

Adding to 12640000265000 its reverse (56200004621), we get a palindrome (12696200269621).

The spelling of 12640000265000 in words is "twelve trillion, six hundred forty billion, two hundred sixty-five thousand".