205026026805 has 24 divisors (see below), whose sum is σ = 363643064928. Its totient is φ = 106804254816.

The previous prime is 205026026801. The next prime is 205026026809. The reversal of 205026026805 is 508620620502.

It is an interprime number because it is at equal distance from previous prime (205026026801) and next prime (205026026809).

It is not a de Polignac number, because 205026026805 - 2² = 205026026801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205026026805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205026026801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52976367 + ... + 52980236.

It is an arithmetic number, because the mean of its divisors is an integer number (15151794372).

Almost surely, 2^205026026805 is an apocalyptic number.

It is an amenable number.

205026026805 is a deficient number, since it is larger than the sum of its proper divisors (158617038123).

205026026805 is a wasteful number, since it uses less digits than its factorization.

205026026805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105956657 (or 105956654 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 205026026805 in words is "two hundred five billion, twenty-six million, twenty-six thousand, eight hundred five".