12889275640 has 64 divisors (see below), whose sum is σ = 29824731360. Its totient is φ = 5011069440.

The previous prime is 12889275599. The next prime is 12889275643. The reversal of 12889275640 is 4657298821.

It is a super-2 number, since 2×12889275640² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12889275643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198430 + ... + 255250.

Almost surely, 2^12889275640 is an apocalyptic number.

12889275640 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 12889275640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14912365680).

12889275640 is an abundant number, since it is smaller than the sum of its proper divisors (16935455720).

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

12889275640 is a wasteful number, since it uses less digits than its factorization.

12889275640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56992 (or 56988 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 12889275640 in words is "twelve billion, eight hundred eighty-nine million, two hundred seventy-five thousand, six hundred forty".