505212058661 has 2 divisors, whose sum is σ = 505212058662. Its totient is φ = 505212058660.

The previous prime is 505212058657. The next prime is 505212058697. The reversal of 505212058661 is 166850212505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502689508036 + 2522550625 = 709006^2 + 50225^2 .

It is a cyclic number.

It is not a de Polignac number, because 505212058661 - 2² = 505212058657 is a prime.

It is a super-2 number, since 2×505212058661² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505212058621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252606029330 + 252606029331.

It is an arithmetic number, because the mean of its divisors is an integer number (252606029331).

Almost surely, 2^505212058661 is an apocalyptic number.

It is an amenable number.

505212058661 is a deficient number, since it is larger than the sum of its proper divisors (1).

505212058661 is an equidigital number, since it uses as much as digits as its factorization.

505212058661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144000, while the sum is 41.

The spelling of 505212058661 in words is "five hundred five billion, two hundred twelve million, fifty-eight thousand, six hundred sixty-one".