711561216612061 has 2 divisors, whose sum is σ = 711561216612062. Its totient is φ = 711561216612060.

The previous prime is 711561216612047. The next prime is 711561216612173. The reversal of 711561216612061 is 160216612165117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 706776580972900 + 4784635639161 = 26585270^2 + 2187381^2 .

It is a cyclic number.

It is not a de Polignac number, because 711561216612061 - 2⁹ = 711561216611549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (711561216312061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355780608306030 + 355780608306031.

It is an arithmetic number, because the mean of its divisors is an integer number (355780608306031).

Almost surely, 2^{711561216612061} is an apocalyptic number.

It is an amenable number.

711561216612061 is a deficient number, since it is larger than the sum of its proper divisors (1).

711561216612061 is an equidigital number, since it uses as much as digits as its factorization.

711561216612061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 46.

Adding to 711561216612061 its reverse (160216612165117), we get a palindrome (871777828777178).

The spelling of 711561216612061 in words is "seven hundred eleven trillion, five hundred sixty-one billion, two hundred sixteen million, six hundred twelve thousand, sixty-one".