505560551101 has 2 divisors, whose sum is σ = 505560551102. Its totient is φ = 505560551100.

The previous prime is 505560551087. The next prime is 505560551141. The reversal of 505560551101 is 101155065505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 501120994201 + 4439556900 = 707899^2 + 66630^2 .

It is a cyclic number.

It is not a de Polignac number, because 505560551101 - 2²¹ = 505558453949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505560551141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252780275550 + 252780275551.

It is an arithmetic number, because the mean of its divisors is an integer number (252780275551).

Almost surely, 2^505560551101 is an apocalyptic number.

It is an amenable number.

505560551101 is a deficient number, since it is larger than the sum of its proper divisors (1).

505560551101 is an equidigital number, since it uses as much as digits as its factorization.

505560551101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18750, while the sum is 34.

The spelling of 505560551101 in words is "five hundred five billion, five hundred sixty million, five hundred fifty-one thousand, one hundred one".