1136635309781 has 2 divisors, whose sum is σ = 1136635309782. Its totient is φ = 1136635309780.

The previous prime is 1136635309699. The next prime is 1136635309787. The reversal of 1136635309781 is 1879035366311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619723200625 + 516912109156 = 787225^2 + 718966^2 .

It is a cyclic number.

It is not a de Polignac number, because 1136635309781 - 2³⁰ = 1135561567957 is a prime.

It is a super-3 number, since 3×1136635309781³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1136635309787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 568317654890 + 568317654891.

It is an arithmetic number, because the mean of its divisors is an integer number (568317654891).

Almost surely, 2^{1136635309781} is an apocalyptic number.

It is an amenable number.

1136635309781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1136635309781 is an equidigital number, since it uses as much as digits as its factorization.

1136635309781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 1136635309781 in words is "one trillion, one hundred thirty-six billion, six hundred thirty-five million, three hundred nine thousand, seven hundred eighty-one".