813800250205 has 16 divisors (see below), whose sum is σ = 999569994624. Its totient is φ = 635871799360.

The previous prime is 813800250203. The next prime is 813800250217. The reversal of 813800250205 is 502052008318.

It is not a de Polignac number, because 813800250205 - 2¹ = 813800250203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813800250203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10674142 + ... + 10750111.

It is an arithmetic number, because the mean of its divisors is an integer number (62473124664).

Almost surely, 2^813800250205 is an apocalyptic number.

It is an amenable number.

813800250205 is a deficient number, since it is larger than the sum of its proper divisors (185769744419).

813800250205 is a wasteful number, since it uses less digits than its factorization.

813800250205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21424436.

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 813800250205 in words is "eight hundred thirteen billion, eight hundred million, two hundred fifty thousand, two hundred five".