1636144605461 has 2 divisors, whose sum is σ = 1636144605462. Its totient is φ = 1636144605460.

The previous prime is 1636144605443. The next prime is 1636144605479. The reversal of 1636144605461 is 1645064416361.

It is a balanced prime because it is at equal distance from previous prime (1636144605443) and next prime (1636144605479).

It can be written as a sum of positive squares in only one way, i.e., 926009742436 + 710134863025 = 962294^2 + 842695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1636144605461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1636144605401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 818072302730 + 818072302731.

It is an arithmetic number, because the mean of its divisors is an integer number (818072302731).

Almost surely, 2^{1636144605461} is an apocalyptic number.

It is an amenable number.

1636144605461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1636144605461 is an equidigital number, since it uses as much as digits as its factorization.

1636144605461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 1636144605461 in words is "one trillion, six hundred thirty-six billion, one hundred forty-four million, six hundred five thousand, four hundred sixty-one".