205274073779 has 2 divisors, whose sum is σ = 205274073780. Its totient is φ = 205274073778.

The previous prime is 205274073769. The next prime is 205274073793. The reversal of 205274073779 is 977370472502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205274073779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205274073779.

It is not a weakly prime, because it can be changed into another prime (205274073769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102637036889 + 102637036890.

It is an arithmetic number, because the mean of its divisors is an integer number (102637036890).

Almost surely, 2^205274073779 is an apocalyptic number.

205274073779 is a deficient number, since it is larger than the sum of its proper divisors (1).

205274073779 is an equidigital number, since it uses as much as digits as its factorization.

205274073779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5186160, while the sum is 53.

The spelling of 205274073779 in words is "two hundred five billion, two hundred seventy-four million, seventy-three thousand, seven hundred seventy-nine".