521607603470461 has 2 divisors, whose sum is σ = 521607603470462. Its totient is φ = 521607603470460.

The previous prime is 521607603470357. The next prime is 521607603470519. The reversal of 521607603470461 is 164074306706125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 395094373674361 + 126513229796100 = 19876981^2 + 11247810^2 .

It is a cyclic number.

It is not a de Polignac number, because 521607603470461 - 2²⁷ = 521607469252733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521607603470399 and 521607603470408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521607603477461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260803801735230 + 260803801735231.

It is an arithmetic number, because the mean of its divisors is an integer number (260803801735231).

Almost surely, 2^{521607603470461} is an apocalyptic number.

It is an amenable number.

521607603470461 is a deficient number, since it is larger than the sum of its proper divisors (1).

521607603470461 is an equidigital number, since it uses as much as digits as its factorization.

521607603470461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 52.

The spelling of 521607603470461 in words is "five hundred twenty-one trillion, six hundred seven billion, six hundred three million, four hundred seventy thousand, four hundred sixty-one".