205870471357 has 24 divisors (see below), whose sum is σ = 225919169280. Its totient is φ = 187336501440.

The previous prime is 205870471349. The next prime is 205870471397. The reversal of 205870471357 is 753174078502.

It is a happy number.

It is not a de Polignac number, because 205870471357 - 2³ = 205870471349 is a prime.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205870471357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205870471397) 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, 861153 + ... + 1073929.

It is an arithmetic number, because the mean of its divisors is an integer number (9413298720).

Almost surely, 2^205870471357 is an apocalyptic number.

It is an amenable number.

205870471357 is a deficient number, since it is larger than the sum of its proper divisors (20048697923).

205870471357 is a wasteful number, since it uses less digits than its factorization.

205870471357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212913 (or 212890 counting only the distinct ones).

The product of its (nonzero) digits is 1646400, while the sum is 49.

The spelling of 205870471357 in words is "two hundred five billion, eight hundred seventy million, four hundred seventy-one thousand, three hundred fifty-seven".