245640143633 has 2 divisors, whose sum is σ = 245640143634. Its totient is φ = 245640143632.

The previous prime is 245640143599. The next prime is 245640143663. The reversal of 245640143633 is 336341046542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180435499729 + 65204643904 = 424777^2 + 255352^2 .

It is a cyclic number.

It is not a de Polignac number, because 245640143633 - 2¹⁰ = 245640142609 is a prime.

It is not a weakly prime, because it can be changed into another prime (245640143663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122820071816 + 122820071817.

It is an arithmetic number, because the mean of its divisors is an integer number (122820071817).

Almost surely, 2^245640143633 is an apocalyptic number.

It is an amenable number.

245640143633 is a deficient number, since it is larger than the sum of its proper divisors (1).

245640143633 is an equidigital number, since it uses as much as digits as its factorization.

245640143633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 41.

The spelling of 245640143633 in words is "two hundred forty-five billion, six hundred forty million, one hundred forty-three thousand, six hundred thirty-three".