505545660157 has 2 divisors, whose sum is σ = 505545660158. Its totient is φ = 505545660156.

The previous prime is 505545659963. The next prime is 505545660163. The reversal of 505545660157 is 751066545505.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261883968516 + 243661691641 = 511746^2 + 493621^2 .

It is a cyclic number.

It is not a de Polignac number, because 505545660157 - 2¹¹ = 505545658109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505545660157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505545660457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252772830078 + 252772830079.

It is an arithmetic number, because the mean of its divisors is an integer number (252772830079).

Almost surely, 2^505545660157 is an apocalyptic number.

It is an amenable number.

505545660157 is a deficient number, since it is larger than the sum of its proper divisors (1).

505545660157 is an equidigital number, since it uses as much as digits as its factorization.

505545660157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3150000, while the sum is 49.

The spelling of 505545660157 in words is "five hundred five billion, five hundred forty-five million, six hundred sixty thousand, one hundred fifty-seven".