136073870681 has 36 divisors (see below), whose sum is σ = 165627094500. Its totient is φ = 111458749248.

The previous prime is 136073870677. The next prime is 136073870683. The reversal of 136073870681 is 186078370631.

It can be written as a sum of positive squares in 2 ways, for example, as 97556275600 + 38517595081 = 312340^2 + 196259^2 .

It is not a de Polignac number, because 136073870681 - 2² = 136073870677 is a prime.

It is a super-2 number, since 2×136073870681² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136073870683) 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 in 35 ways as a sum of consecutive naturals, for example, 40149935 + ... + 40153323.

It is an arithmetic number, because the mean of its divisors is an integer number (4600752625).

Almost surely, 2^136073870681 is an apocalyptic number.

It is an amenable number.

136073870681 is a deficient number, since it is larger than the sum of its proper divisors (29553223819).

136073870681 is a wasteful number, since it uses less digits than its factorization.

136073870681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4998 (or 4968 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 136073870681 in words is "one hundred thirty-six billion, seventy-three million, eight hundred seventy thousand, six hundred eighty-one".