1161155265077 has 2 divisors, whose sum is σ = 1161155265078. Its totient is φ = 1161155265076.

The previous prime is 1161155265007. The next prime is 1161155265089. The reversal of 1161155265077 is 7705625511611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 685118742961 + 476036522116 = 827719^2 + 689954^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161155265077 - 2⁸ = 1161155264821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161155265007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580577632538 + 580577632539.

It is an arithmetic number, because the mean of its divisors is an integer number (580577632539).

Almost surely, 2^{1161155265077} is an apocalyptic number.

It is an amenable number.

1161155265077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161155265077 is an equidigital number, since it uses as much as digits as its factorization.

1161155265077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 441000, while the sum is 47.

The spelling of 1161155265077 in words is "one trillion, one hundred sixty-one billion, one hundred fifty-five million, two hundred sixty-five thousand, seventy-seven".