136194488781 has 12 divisors (see below), whose sum is σ = 196635830688. Its totient is φ = 83811992784.

The previous prime is 136194488761. The next prime is 136194488893. The reversal of 136194488781 is 187884491631.

It is not a de Polignac number, because 136194488781 - 2¹⁰ = 136194487757 is a prime.

It is a super-2 number, since 2×136194488781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136194488761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134313585 + ... + 134314598.

It is an arithmetic number, because the mean of its divisors is an integer number (16386319224).

Almost surely, 2^136194488781 is an apocalyptic number.

It is an amenable number.

136194488781 is a deficient number, since it is larger than the sum of its proper divisors (60441341907).

136194488781 is a wasteful number, since it uses less digits than its factorization.

136194488781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268628212 (or 268628199 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 60.

The spelling of 136194488781 in words is "one hundred thirty-six billion, one hundred ninety-four million, four hundred eighty-eight thousand, seven hundred eighty-one".