12251645728651 has 12 divisors (see below), whose sum is σ = 14293465209552. Its totient is φ = 10501410610152.

The previous prime is 12251645728631. The next prime is 12251645728667. The reversal of 12251645728651 is 15682754615221.

It is a happy number.

It is not a de Polignac number, because 12251645728651 - 2⁷ = 12251645728523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12251645728592 and 12251645728601.

It is not an unprimeable number, because it can be changed into a prime (12251645728631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 364463640 + ... + 364497253.

It is an arithmetic number, because the mean of its divisors is an integer number (1191122100796).

Almost surely, 2^{12251645728651} is an apocalyptic number.

12251645728651 is a deficient number, since it is larger than the sum of its proper divisors (2041819480901).

12251645728651 is an frugal number, since it uses more digits than its factorization.

12251645728651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728960928 (or 728960900 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 55.

The spelling of 12251645728651 in words is "twelve trillion, two hundred fifty-one billion, six hundred forty-five million, seven hundred twenty-eight thousand, six hundred fifty-one".