505510156401247 has 2 divisors, whose sum is σ = 505510156401248. Its totient is φ = 505510156401246.

The previous prime is 505510156401209. The next prime is 505510156401269. The reversal of 505510156401247 is 742104651015505.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505510156401247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 505510156401197 and 505510156401206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505510156491247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252755078200623 + 252755078200624.

It is an arithmetic number, because the mean of its divisors is an integer number (252755078200624).

Almost surely, 2^{505510156401247} is an apocalyptic number.

505510156401247 is a deficient number, since it is larger than the sum of its proper divisors (1).

505510156401247 is an equidigital number, since it uses as much as digits as its factorization.

505510156401247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840000, while the sum is 46.

The spelling of 505510156401247 in words is "five hundred five trillion, five hundred ten billion, one hundred fifty-six million, four hundred one thousand, two hundred forty-seven".