136187445181 has 4 divisors (see below), whose sum is σ = 136203174432. Its totient is φ = 136171715932.

The previous prime is 136187445137. The next prime is 136187445203. The reversal of 136187445181 is 181544781631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 181544781631 = 599 ⋅303079769.

It is a cyclic number.

It is not a de Polignac number, because 136187445181 - 2¹³ = 136187436989 is a prime.

It is a super-2 number, since 2×136187445181² (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 (136187445101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7851631 + ... + 7868956.

It is an arithmetic number, because the mean of its divisors is an integer number (34050793608).

Almost surely, 2^136187445181 is an apocalyptic number.

It is an amenable number.

136187445181 is a deficient number, since it is larger than the sum of its proper divisors (15729251).

136187445181 is an equidigital number, since it uses as much as digits as its factorization.

136187445181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15729250.

The product of its digits is 645120, while the sum is 49.

The spelling of 136187445181 in words is "one hundred thirty-six billion, one hundred eighty-seven million, four hundred forty-five thousand, one hundred eighty-one".