1336236061561 has 2 divisors, whose sum is σ = 1336236061562. Its totient is φ = 1336236061560.

The previous prime is 1336236061543. The next prime is 1336236061571. The reversal of 1336236061561 is 1651606326331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1293123768336 + 43112293225 = 1137156^2 + 207635^2 .

It is a cyclic number.

It is not a de Polignac number, because 1336236061561 - 2¹⁷ = 1336235930489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1336236061571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 668118030780 + 668118030781.

It is an arithmetic number, because the mean of its divisors is an integer number (668118030781).

Almost surely, 2^{1336236061561} is an apocalyptic number.

It is an amenable number.

1336236061561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1336236061561 is an equidigital number, since it uses as much as digits as its factorization.

1336236061561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 43.

The spelling of 1336236061561 in words is "one trillion, three hundred thirty-six billion, two hundred thirty-six million, sixty-one thousand, five hundred sixty-one".