12251441665 has 16 divisors (see below), whose sum is σ = 15125647680. Its totient is φ = 9519474240.

The previous prime is 12251441659. The next prime is 12251441693. The reversal of 12251441665 is 56614415221.

It is not a de Polignac number, because 12251441665 - 2¹¹ = 12251439617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47646 + ... + 163624.

It is an arithmetic number, because the mean of its divisors is an integer number (945352980).

Almost surely, 2^12251441665 is an apocalyptic number.

It is an amenable number.

12251441665 is a deficient number, since it is larger than the sum of its proper divisors (2874206015).

12251441665 is a wasteful number, since it uses less digits than its factorization.

12251441665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116592.

The product of its digits is 57600, while the sum is 37.

Adding to 12251441665 its reverse (56614415221), we get a palindrome (68865856886).

The spelling of 12251441665 in words is "twelve billion, two hundred fifty-one million, four hundred forty-one thousand, six hundred sixty-five".