205054638407 has 2 divisors, whose sum is σ = 205054638408. Its totient is φ = 205054638406.

The previous prime is 205054638337. The next prime is 205054638421. The reversal of 205054638407 is 704836450502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205054638407 - 2¹⁰ = 205054637383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205054638427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102527319203 + 102527319204.

It is an arithmetic number, because the mean of its divisors is an integer number (102527319204).

Almost surely, 2^205054638407 is an apocalyptic number.

205054638407 is a deficient number, since it is larger than the sum of its proper divisors (1).

205054638407 is an equidigital number, since it uses as much as digits as its factorization.

205054638407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 806400, while the sum is 44.

The spelling of 205054638407 in words is "two hundred five billion, fifty-four million, six hundred thirty-eight thousand, four hundred seven".