12251355306665 has 32 divisors (see below), whose sum is σ = 15934984934400. Its totient is φ = 9011831316480.

The previous prime is 12251355306643. The next prime is 12251355306737. The reversal of 12251355306665 is 56660355315221.

It is a happy number.

It is not a de Polignac number, because 12251355306665 - 2¹⁰ = 12251355305641 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7396985 + ... + 8900454.

It is an arithmetic number, because the mean of its divisors is an integer number (497968279200).

Almost surely, 2^{12251355306665} is an apocalyptic number.

It is an amenable number.

12251355306665 is a deficient number, since it is larger than the sum of its proper divisors (3683629627735).

12251355306665 is a wasteful number, since it uses less digits than its factorization.

12251355306665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16297697.

The product of its (nonzero) digits is 4860000, while the sum is 50.

The spelling of 12251355306665 in words is "twelve trillion, two hundred fifty-one billion, three hundred fifty-five million, three hundred six thousand, six hundred sixty-five".