505505554951 has 2 divisors, whose sum is σ = 505505554952. Its totient is φ = 505505554950.

The previous prime is 505505554949. The next prime is 505505554963. The reversal of 505505554951 is 159455505505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505505554951 - 2¹ = 505505554949 is a prime.

It is a super-2 number, since 2×505505554951² (a number of 24 digits) contains 22 as substring.

Together with 505505554949, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 505505554895 and 505505554904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505505557951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252752777475 + 252752777476.

It is an arithmetic number, because the mean of its divisors is an integer number (252752777476).

Almost surely, 2^505505554951 is an apocalyptic number.

505505554951 is a deficient number, since it is larger than the sum of its proper divisors (1).

505505554951 is an equidigital number, since it uses as much as digits as its factorization.

505505554951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2812500, while the sum is 49.

The spelling of 505505554951 in words is "five hundred five billion, five hundred five million, five hundred fifty-four thousand, nine hundred fifty-one".