136140026356661 has 2 divisors, whose sum is σ = 136140026356662. Its totient is φ = 136140026356660.

The previous prime is 136140026356487. The next prime is 136140026356679. The reversal of 136140026356661 is 166653620041631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132772177427761 + 3367848928900 = 11522681^2 + 1835170^2 .

It is an emirp because it is prime and its reverse (166653620041631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136140026356661 - 2¹⁸ = 136140026094517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136140026356861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68070013178330 + 68070013178331.

It is an arithmetic number, because the mean of its divisors is an integer number (68070013178331).

Almost surely, 2^{136140026356661} is an apocalyptic number.

It is an amenable number.

136140026356661 is a deficient number, since it is larger than the sum of its proper divisors (1).

136140026356661 is an equidigital number, since it uses as much as digits as its factorization.

136140026356661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 50.

The spelling of 136140026356661 in words is "one hundred thirty-six trillion, one hundred forty billion, twenty-six million, three hundred fifty-six thousand, six hundred sixty-one".