136461161 has 8 divisors (see below), whose sum is σ = 139942824. Its totient is φ = 132986880.

The previous prime is 136461151. The next prime is 136461181. The reversal of 136461161 is 161164631.

It can be written as a sum of positive squares in 4 ways, for example, as 5221225 + 131239936 = 2285^2 + 11456^2 .

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-136461161 is a prime.

It is a super-2 number, since 2×136461161² = 37243296922935842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136461131) 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, 71921 + ... + 73793.

It is an arithmetic number, because the mean of its divisors is an integer number (17492853).

Almost surely, 2^136461161 is an apocalyptic number.

It is an amenable number.

136461161 is a deficient number, since it is larger than the sum of its proper divisors (3481663).

136461161 is a wasteful number, since it uses less digits than its factorization.

136461161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3691.

The product of its digits is 2592, while the sum is 29.

The square root of 136461161 is about 11681.6591715389. The cubic root of 136461161 is about 514.8369245197.

The spelling of 136461161 in words is "one hundred thirty-six million, four hundred sixty-one thousand, one hundred sixty-one".