136040442061 has 4 divisors (see below), whose sum is σ = 136112921532. Its totient is φ = 135967962592.

The previous prime is 136040442059. The next prime is 136040442079. The reversal of 136040442061 is 160244040631.

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 59350217161 + 76690224900 = 243619^2 + 276930^2 .

It is a cyclic number.

It is not a de Polignac number, because 136040442061 - 2¹ = 136040442059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136040442091) 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, 36236920 + ... + 36240673.

It is an arithmetic number, because the mean of its divisors is an integer number (34028230383).

Almost surely, 2^136040442061 is an apocalyptic number.

It is an amenable number.

136040442061 is a deficient number, since it is larger than the sum of its proper divisors (72479471).

136040442061 is an equidigital number, since it uses as much as digits as its factorization.

136040442061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72479470.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 136040442061 its reverse (160244040631), we get a palindrome (296284482692).

The spelling of 136040442061 in words is "one hundred thirty-six billion, forty million, four hundred forty-two thousand, sixty-one".