721753242743147 has 2 divisors, whose sum is σ = 721753242743148. Its totient is φ = 721753242743146.

The previous prime is 721753242743111. The next prime is 721753242743153. The reversal of 721753242743147 is 741347242357127.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 721753242743147 - 2⁶ = 721753242743083 is a prime.

It is not a weakly prime, because it can be changed into another prime (721753242743347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360876621371573 + 360876621371574.

It is an arithmetic number, because the mean of its divisors is an integer number (360876621371574).

Almost surely, 2^{721753242743147} is an apocalyptic number.

721753242743147 is a deficient number, since it is larger than the sum of its proper divisors (1).

721753242743147 is an equidigital number, since it uses as much as digits as its factorization.

721753242743147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55319040, while the sum is 59.

The spelling of 721753242743147 in words is "seven hundred twenty-one trillion, seven hundred fifty-three billion, two hundred forty-two million, seven hundred forty-three thousand, one hundred forty-seven".