206105550354 has 128 divisors (see below), whose sum is σ = 509839868160. Its totient is φ = 61190553600.

The previous prime is 206105550337. The next prime is 206105550373. The reversal of 206105550354 is 453055501602.

206105550354 is a `hidden beast` number, since 2 + 0 + 610 + 5 + 5 + 5 + 0 + 35 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9301072 + ... + 9323204.

It is an arithmetic number, because the mean of its divisors is an integer number (3983123970).

Almost surely, 2^206105550354 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206105550354, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254919934080).

206105550354 is an abundant number, since it is smaller than the sum of its proper divisors (303734317806).

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

206105550354 is a wasteful number, since it uses less digits than its factorization.

206105550354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22473 (or 22467 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 206105550354 in words is "two hundred six billion, one hundred five million, five hundred fifty thousand, three hundred fifty-four".