113156635561 has 2 divisors, whose sum is σ = 113156635562. Its totient is φ = 113156635560.

The previous prime is 113156635517. The next prime is 113156635567. The reversal of 113156635561 is 165536651311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79337425561 + 33819210000 = 281669^2 + 183900^2 .

It is a cyclic number.

It is not a de Polignac number, because 113156635561 - 2¹³ = 113156627369 is a prime.

It is not a weakly prime, because it can be changed into another prime (113156635567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56578317780 + 56578317781.

It is an arithmetic number, because the mean of its divisors is an integer number (56578317781).

Almost surely, 2^113156635561 is an apocalyptic number.

It is an amenable number.

113156635561 is a deficient number, since it is larger than the sum of its proper divisors (1).

113156635561 is an equidigital number, since it uses as much as digits as its factorization.

113156635561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 243000, while the sum is 43.

The spelling of 113156635561 in words is "one hundred thirteen billion, one hundred fifty-six million, six hundred thirty-five thousand, five hundred sixty-one".