743725896521 has 2 divisors, whose sum is σ = 743725896522. Its totient is φ = 743725896520.

The previous prime is 743725896479. The next prime is 743725896587. The reversal of 743725896521 is 125698527347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 408327390025 + 335398506496 = 639005^2 + 579136^2 .

It is a cyclic number.

It is not a de Polignac number, because 743725896521 - 2³⁰ = 742652154697 is a prime.

It is not a weakly prime, because it can be changed into another prime (743725890521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371862948260 + 371862948261.

It is an arithmetic number, because the mean of its divisors is an integer number (371862948261).

Almost surely, 2^743725896521 is an apocalyptic number.

It is an amenable number.

743725896521 is a deficient number, since it is larger than the sum of its proper divisors (1).

743725896521 is an equidigital number, since it uses as much as digits as its factorization.

743725896521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25401600, while the sum is 59.

The spelling of 743725896521 in words is "seven hundred forty-three billion, seven hundred twenty-five million, eight hundred ninety-six thousand, five hundred twenty-one".