206403143550 has 48 divisors (see below), whose sum is σ = 511926258432. Its totient is φ = 55035842400.

The previous prime is 206403143549. The next prime is 206403143599. The reversal of 206403143550 is 55341304602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1775307 + ... + 1887993.

It is an arithmetic number, because the mean of its divisors is an integer number (10665130384).

Almost surely, 2^206403143550 is an apocalyptic number.

206403143550 is an abundant number, since it is smaller than the sum of its proper divisors (305523114882).

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

206403143550 is a wasteful number, since it uses less digits than its factorization.

206403143550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124913 (or 124908 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The spelling of 206403143550 in words is "two hundred six billion, four hundred three million, one hundred forty-three thousand, five hundred fifty".