206623435356 has 96 divisors (see below), whose sum is σ = 577965819200. Its totient is φ = 63458691840.

The previous prime is 206623435351. The next prime is 206623435367. The reversal of 206623435356 is 653534326602.

206623435356 is a `hidden beast` number, since 2 + 0 + 66 + 234 + 3 + 5 + 356 = 666.

It is a super-2 number, since 2×206623435356² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206623435351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 623550 + ... + 895578.

Almost surely, 2^206623435356 is an apocalyptic number.

206623435356 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206623435356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288982909600).

206623435356 is an abundant number, since it is smaller than the sum of its proper divisors (371342383844).

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

206623435356 is a wasteful number, since it uses less digits than its factorization.

206623435356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272596 (or 272588 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 45.

The spelling of 206623435356 in words is "two hundred six billion, six hundred twenty-three million, four hundred thirty-five thousand, three hundred fifty-six".