136611451 has 4 divisors (see below), whose sum is σ = 141018304. Its totient is φ = 132204600.

The previous prime is 136611427. The next prime is 136611479. The reversal of 136611451 is 154116631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136611451 - 2²¹ = 134514299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136611401) 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, 2203380 + ... + 2203441.

It is an arithmetic number, because the mean of its divisors is an integer number (35254576).

Almost surely, 2^136611451 is an apocalyptic number.

136611451 is a deficient number, since it is larger than the sum of its proper divisors (4406853).

136611451 is an equidigital number, since it uses as much as digits as its factorization.

136611451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4406852.

The product of its digits is 2160, while the sum is 28.

The square root of 136611451 is about 11688.0901348338. The cubic root of 136611451 is about 515.0258585062.

The spelling of 136611451 in words is "one hundred thirty-six million, six hundred eleven thousand, four hundred fifty-one".