11561155672757 has 2 divisors, whose sum is σ = 11561155672758. Its totient is φ = 11561155672756.

The previous prime is 11561155672753. The next prime is 11561155672771. The reversal of 11561155672757 is 75727655116511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7371474782116 + 4189680890641 = 2715046^2 + 2046871^2 .

It is a cyclic number.

It is not a de Polignac number, because 11561155672757 - 2² = 11561155672753 is a prime.

It is a super-2 number, since 2×11561155672757² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11561155672696 and 11561155672705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11561155672753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5780577836378 + 5780577836379.

It is an arithmetic number, because the mean of its divisors is an integer number (5780577836379).

Almost surely, 2^{11561155672757} is an apocalyptic number.

It is an amenable number.

11561155672757 is a deficient number, since it is larger than the sum of its proper divisors (1).

11561155672757 is an equidigital number, since it uses as much as digits as its factorization.

11561155672757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15435000, while the sum is 59.

The spelling of 11561155672757 in words is "eleven trillion, five hundred sixty-one billion, one hundred fifty-five million, six hundred seventy-two thousand, seven hundred fifty-seven".