506242445551 has 2 divisors, whose sum is σ = 506242445552. Its totient is φ = 506242445550.

The previous prime is 506242445549. The next prime is 506242445567. The reversal of 506242445551 is 155544242605.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 506242445551 - 2¹ = 506242445549 is a prime.

Together with 506242445549, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 506242445498 and 506242445507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506242442551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253121222775 + 253121222776.

It is an arithmetic number, because the mean of its divisors is an integer number (253121222776).

Almost surely, 2^506242445551 is an apocalyptic number.

506242445551 is a deficient number, since it is larger than the sum of its proper divisors (1).

506242445551 is an equidigital number, since it uses as much as digits as its factorization.

506242445551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960000, while the sum is 43.

The spelling of 506242445551 in words is "five hundred six billion, two hundred forty-two million, four hundred forty-five thousand, five hundred fifty-one".