521260045349 has 2 divisors, whose sum is σ = 521260045350. Its totient is φ = 521260045348.

The previous prime is 521260045291. The next prime is 521260045393. The reversal of 521260045349 is 943540062125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 293783512324 + 227476533025 = 542018^2 + 476945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521260045349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521260045849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260630022674 + 260630022675.

It is an arithmetic number, because the mean of its divisors is an integer number (260630022675).

Almost surely, 2^521260045349 is an apocalyptic number.

It is an amenable number.

521260045349 is a deficient number, since it is larger than the sum of its proper divisors (1).

521260045349 is an equidigital number, since it uses as much as digits as its factorization.

521260045349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 521260045349 in words is "five hundred twenty-one billion, two hundred sixty million, forty-five thousand, three hundred forty-nine".