205453504999 has 2 divisors, whose sum is σ = 205453505000. Its totient is φ = 205453504998.

The previous prime is 205453504933. The next prime is 205453505053. The reversal of 205453504999 is 999405354502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205453504999 - 2¹¹ = 205453502951 is a prime.

It is a super-2 number, since 2×205453504999² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205453574999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102726752499 + 102726752500.

It is an arithmetic number, because the mean of its divisors is an integer number (102726752500).

Almost surely, 2^205453504999 is an apocalyptic number.

205453504999 is a deficient number, since it is larger than the sum of its proper divisors (1).

205453504999 is an equidigital number, since it uses as much as digits as its factorization.

205453504999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748000, while the sum is 55.

The spelling of 205453504999 in words is "two hundred five billion, four hundred fifty-three million, five hundred four thousand, nine hundred ninety-nine".