12651240000000 has 640 divisors, whose sum is σ = 48151207982592. Its totient is φ = 2891520000000.

The previous prime is 12651239999939. The next prime is 12651240000031. The reversal of 12651240000000 is 4215621.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 839992470 + ... + 840007530.

Almost surely, 2^{12651240000000} is an apocalyptic number.

12651240000000 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 12651240000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24075603991296).

12651240000000 is an abundant number, since it is smaller than the sum of its proper divisors (35499967982592).

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

12651240000000 is an frugal number, since it uses more digits than its factorization.

12651240000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15124 (or 15078 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 12651240000000 its reverse (4215621), we get a palindrome (12651244215621).

The spelling of 12651240000000 in words is "twelve trillion, six hundred fifty-one billion, two hundred forty million", and thus it is an aban number.