136151861 has 4 divisors (see below), whose sum is σ = 144160812. Its totient is φ = 128142912.

The previous prime is 136151849. The next prime is 136151863. The reversal of 136151861 is 168151631.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47679025 + 88472836 = 6905^2 + 9406^2 .

It is a cyclic number.

It is not a de Polignac number, because 136151861 - 2⁶ = 136151797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136151863) 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, 4004450 + ... + 4004483.

It is an arithmetic number, because the mean of its divisors is an integer number (36040203).

Almost surely, 2^136151861 is an apocalyptic number.

It is an amenable number.

136151861 is a deficient number, since it is larger than the sum of its proper divisors (8008951).

136151861 is an equidigital number, since it uses as much as digits as its factorization.

136151861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8008950.

The product of its digits is 4320, while the sum is 32.

The square root of 136151861 is about 11668.4129597816. The cubic root of 136151861 is about 514.4476574183.

The spelling of 136151861 in words is "one hundred thirty-six million, one hundred fifty-one thousand, eight hundred sixty-one".