1636632420133 has 2 divisors, whose sum is σ = 1636632420134. Its totient is φ = 1636632420132.

The previous prime is 1636632420103. The next prime is 1636632420167. The reversal of 1636632420133 is 3310242366361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1370590001284 + 266042418849 = 1170722^2 + 515793^2 .

It is a cyclic number.

It is not a de Polignac number, because 1636632420133 - 2²¹ = 1636630322981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1636632420103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 818316210066 + 818316210067.

It is an arithmetic number, because the mean of its divisors is an integer number (818316210067).

Almost surely, 2^{1636632420133} is an apocalyptic number.

It is an amenable number.

1636632420133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1636632420133 is an equidigital number, since it uses as much as digits as its factorization.

1636632420133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 40.

Adding to 1636632420133 its reverse (3310242366361), we get a palindrome (4946874786494).

The spelling of 1636632420133 in words is "one trillion, six hundred thirty-six billion, six hundred thirty-two million, four hundred twenty thousand, one hundred thirty-three".