45457450721 has 2 divisors, whose sum is σ = 45457450722. Its totient is φ = 45457450720.

The previous prime is 45457450699. The next prime is 45457450739. The reversal of 45457450721 is 12705475454.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40378893025 + 5078557696 = 200945^2 + 71264^2 .

It is a cyclic number.

It is not a de Polignac number, because 45457450721 - 2¹⁸ = 45457188577 is a prime.

It is not a weakly prime, because it can be changed into another prime (45457450321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22728725360 + 22728725361.

It is an arithmetic number, because the mean of its divisors is an integer number (22728725361).

Almost surely, 2^45457450721 is an apocalyptic number.

It is an amenable number.

45457450721 is a deficient number, since it is larger than the sum of its proper divisors (1).

45457450721 is an equidigital number, since it uses as much as digits as its factorization.

45457450721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784000, while the sum is 44.

The spelling of 45457450721 in words is "forty-five billion, four hundred fifty-seven million, four hundred fifty thousand, seven hundred twenty-one".