205550013439 has 2 divisors, whose sum is σ = 205550013440. Its totient is φ = 205550013438.

The previous prime is 205550013407. The next prime is 205550013451. The reversal of 205550013439 is 934310055502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205550013439 - 2⁵ = 205550013407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205550013398 and 205550013407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205550013479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102775006719 + 102775006720.

It is an arithmetic number, because the mean of its divisors is an integer number (102775006720).

Almost surely, 2^205550013439 is an apocalyptic number.

205550013439 is a deficient number, since it is larger than the sum of its proper divisors (1).

205550013439 is an equidigital number, since it uses as much as digits as its factorization.

205550013439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81000, while the sum is 37.

The spelling of 205550013439 in words is "two hundred five billion, five hundred fifty million, thirteen thousand, four hundred thirty-nine".