14774947780721 has 2 divisors, whose sum is σ = 14774947780722. Its totient is φ = 14774947780720.

The previous prime is 14774947780717. The next prime is 14774947780739. The reversal of 14774947780721 is 12708774947741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11601244723600 + 3173703057121 = 3406060^2 + 1781489^2 .

It is a cyclic number.

It is not a de Polignac number, because 14774947780721 - 2² = 14774947780717 is a prime.

It is not a weakly prime, because it can be changed into another prime (14774947980721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7387473890360 + 7387473890361.

It is an arithmetic number, because the mean of its divisors is an integer number (7387473890361).

Almost surely, 2^{14774947780721} is an apocalyptic number.

It is an amenable number.

14774947780721 is a deficient number, since it is larger than the sum of its proper divisors (1).

14774947780721 is an equidigital number, since it uses as much as digits as its factorization.

14774947780721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 154893312, while the sum is 68.

The spelling of 14774947780721 in words is "fourteen trillion, seven hundred seventy-four billion, nine hundred forty-seven million, seven hundred eighty thousand, seven hundred twenty-one".