136157859181 has 8 divisors (see below), whose sum is σ = 136490211000. Its totient is φ = 135825780480.

The previous prime is 136157859157. The next prime is 136157859209. The reversal of 136157859181 is 181958751631.

It can be written as a sum of positive squares in 4 ways, for example, as 50584058281 + 85573800900 = 224909^2 + 292530^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136157859181 is a prime.

It is a super-2 number, since 2×136157859181² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136157854181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948385 + ... + 1082473.

It is an arithmetic number, because the mean of its divisors is an integer number (17061276375).

Almost surely, 2^136157859181 is an apocalyptic number.

It is an amenable number.

136157859181 is a deficient number, since it is larger than the sum of its proper divisors (332351819).

136157859181 is a wasteful number, since it uses less digits than its factorization.

136157859181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136559.

The product of its digits is 1814400, while the sum is 55.

The spelling of 136157859181 in words is "one hundred thirty-six billion, one hundred fifty-seven million, eight hundred fifty-nine thousand, one hundred eighty-one".