136061513611861 has 2 divisors, whose sum is σ = 136061513611862. Its totient is φ = 136061513611860.

The previous prime is 136061513611799. The next prime is 136061513611867. The reversal of 136061513611861 is 168116315160631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115488766764900 + 20572746846961 = 10746570^2 + 4535719^2 .

It is a cyclic number.

It is not a de Polignac number, because 136061513611861 - 2²⁵ = 136061480057429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136061513611867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68030756805930 + 68030756805931.

It is an arithmetic number, because the mean of its divisors is an integer number (68030756805931).

Almost surely, 2^{136061513611861} is an apocalyptic number.

It is an amenable number.

136061513611861 is a deficient number, since it is larger than the sum of its proper divisors (1).

136061513611861 is an equidigital number, since it uses as much as digits as its factorization.

136061513611861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 49.

The spelling of 136061513611861 in words is "one hundred thirty-six trillion, sixty-one billion, five hundred thirteen million, six hundred eleven thousand, eight hundred sixty-one".