1636243153 has 2 divisors, whose sum is σ = 1636243154. Its totient is φ = 1636243152.

The previous prime is 1636243111. The next prime is 1636243157. The reversal of 1636243153 is 3513426361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 932508369 + 703734784 = 30537^2 + 26528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1636243153 is a prime.

It is not a weakly prime, because it can be changed into another prime (1636243157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 818121576 + 818121577.

It is an arithmetic number, because the mean of its divisors is an integer number (818121577).

Almost surely, 2^1636243153 is an apocalyptic number.

It is an amenable number.

1636243153 is a deficient number, since it is larger than the sum of its proper divisors (1).

1636243153 is an equidigital number, since it uses as much as digits as its factorization.

1636243153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 34.

The square root of 1636243153 is about 40450.5025061494. The cubic root of 1636243153 is about 1178.3725417011.

The spelling of 1636243153 in words is "one billion, six hundred thirty-six million, two hundred forty-three thousand, one hundred fifty-three".