505555456061 has 2 divisors, whose sum is σ = 505555456062. Its totient is φ = 505555456060.

The previous prime is 505555456019. The next prime is 505555456073. The reversal of 505555456061 is 160654555505.

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., 500564740036 + 4990716025 = 707506^2 + 70645^2 .

It is a cyclic number.

It is not a de Polignac number, because 505555456061 - 2²² = 505551261757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 505555455997 and 505555456015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505555456361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252777728030 + 252777728031.

It is an arithmetic number, because the mean of its divisors is an integer number (252777728031).

Almost surely, 2^505555456061 is an apocalyptic number.

It is an amenable number.

505555456061 is a deficient number, since it is larger than the sum of its proper divisors (1).

505555456061 is an equidigital number, since it uses as much as digits as its factorization.

505555456061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250000, while the sum is 47.

The spelling of 505555456061 in words is "five hundred five billion, five hundred fifty-five million, four hundred fifty-six thousand, sixty-one".