506165634563 has 2 divisors, whose sum is σ = 506165634564. Its totient is φ = 506165634562.

The previous prime is 506165634553. The next prime is 506165634593. The reversal of 506165634563 is 365436561605.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 506165634563 - 2²² = 506161440259 is a prime.

It is a super-2 number, since 2×506165634563² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (506165634503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253082817281 + 253082817282.

It is an arithmetic number, because the mean of its divisors is an integer number (253082817282).

Almost surely, 2^506165634563 is an apocalyptic number.

506165634563 is a deficient number, since it is larger than the sum of its proper divisors (1).

506165634563 is an equidigital number, since it uses as much as digits as its factorization.

506165634563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832000, while the sum is 50.

The spelling of 506165634563 in words is "five hundred six billion, one hundred sixty-five million, six hundred thirty-four thousand, five hundred sixty-three".