561101061077 has 2 divisors, whose sum is σ = 561101061078. Its totient is φ = 561101061076.

The previous prime is 561101060983. The next prime is 561101061109. The reversal of 561101061077 is 770160101165.

561101061077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432471955876 + 128629105201 = 657626^2 + 358649^2 .

It is a cyclic number.

It is not a de Polignac number, because 561101061077 - 2¹² = 561101056981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561101091077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280550530538 + 280550530539.

It is an arithmetic number, because the mean of its divisors is an integer number (280550530539).

Almost surely, 2^561101061077 is an apocalyptic number.

It is an amenable number.

561101061077 is a deficient number, since it is larger than the sum of its proper divisors (1).

561101061077 is an equidigital number, since it uses as much as digits as its factorization.

561101061077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 35.

The spelling of 561101061077 in words is "five hundred sixty-one billion, one hundred one million, sixty-one thousand, seventy-seven".