5406544721 has 2 divisors, whose sum is σ = 5406544722. Its totient is φ = 5406544720.

The previous prime is 5406544711. The next prime is 5406544727. The reversal of 5406544721 is 1274456045.

It is a happy number.

5406544721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5009100625 + 397444096 = 70775^2 + 19936^2 .

It is a cyclic number.

It is not a de Polignac number, because 5406544721 - 2¹⁰ = 5406543697 is a prime.

It is not a weakly prime, because it can be changed into another prime (5406544727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2703272360 + 2703272361.

It is an arithmetic number, because the mean of its divisors is an integer number (2703272361).

Almost surely, 2^5406544721 is an apocalyptic number.

It is an amenable number.

5406544721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5406544721 is an equidigital number, since it uses as much as digits as its factorization.

5406544721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134400, while the sum is 38.

The square root of 5406544721 is about 73529.2099848761. The cubic root of 5406544721 is about 1755.1191301237.

The spelling of 5406544721 in words is "five billion, four hundred six million, five hundred forty-four thousand, seven hundred twenty-one".