136742242187 has 2 divisors, whose sum is σ = 136742242188. Its totient is φ = 136742242186.

The previous prime is 136742242111. The next prime is 136742242193. The reversal of 136742242187 is 781242247631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136742242187 - 2¹² = 136742238091 is a prime.

It is not a weakly prime, because it can be changed into another prime (136742242687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68371121093 + 68371121094.

It is an arithmetic number, because the mean of its divisors is an integer number (68371121094).

Almost surely, 2^136742242187 is an apocalyptic number.

136742242187 is a deficient number, since it is larger than the sum of its proper divisors (1).

136742242187 is an equidigital number, since it uses as much as digits as its factorization.

136742242187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 47.

The spelling of 136742242187 in words is "one hundred thirty-six billion, seven hundred forty-two million, two hundred forty-two thousand, one hundred eighty-seven".