136872471145 has 4 divisors (see below), whose sum is σ = 164246965380. Its totient is φ = 109497976912.

The previous prime is 136872471121. The next prime is 136872471173. The reversal of 136872471145 is 541174278631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541174278631 = 7 ⋅77310611233.

It can be written as a sum of positive squares in 2 ways, for example, as 71792379481 + 65080091664 = 267941^2 + 255108^2 .

It is a cyclic number.

It is not a de Polignac number, because 136872471145 - 2⁷ = 136872471017 is a prime.

It is a super-2 number, since 2×136872471145² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13687247110 + ... + 13687247119.

It is an arithmetic number, because the mean of its divisors is an integer number (41061741345).

Almost surely, 2^136872471145 is an apocalyptic number.

It is an amenable number.

136872471145 is a deficient number, since it is larger than the sum of its proper divisors (27374494235).

136872471145 is an equidigital number, since it uses as much as digits as its factorization.

136872471145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27374494234.

The product of its digits is 1128960, while the sum is 49.

The spelling of 136872471145 in words is "one hundred thirty-six billion, eight hundred seventy-two million, four hundred seventy-one thousand, one hundred forty-five".