206353775256 has 192 divisors, whose sum is σ = 573519225600. Its totient is φ = 61742241792.

The previous prime is 206353775197. The next prime is 206353775261. The reversal of 206353775256 is 652577353602.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 206353775199 and 206353775208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60459406 + ... + 60462818.

It is an arithmetic number, because the mean of its divisors is an integer number (2987079300).

Almost surely, 2^206353775256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206353775256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286759612800).

206353775256 is an abundant number, since it is smaller than the sum of its proper divisors (367165450344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206353775256 is a wasteful number, since it uses less digits than its factorization.

206353775256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3858 (or 3837 counting only the distinct ones).

The product of its (nonzero) digits is 7938000, while the sum is 51.

The spelling of 206353775256 in words is "two hundred six billion, three hundred fifty-three million, seven hundred seventy-five thousand, two hundred fifty-six".