200156561550 has 144 divisors (see below), whose sum is σ = 587314945152. Its totient is φ = 48467035200.

The previous prime is 200156561491. The next prime is 200156561603. The reversal of 200156561550 is 55165651002.

200156561550 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 56 + 56 + 1 + 550 = 666.

200156561550 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4367857 + ... + 4413443.

It is an arithmetic number, because the mean of its divisors is an integer number (4078576008).

Almost surely, 2^200156561550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200156561550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293657472576).

200156561550 is an abundant number, since it is smaller than the sum of its proper divisors (387158383602).

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

200156561550 is a wasteful number, since it uses less digits than its factorization.

200156561550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46503 (or 46495 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 200156561550 in words is "two hundred billion, one hundred fifty-six million, five hundred sixty-one thousand, five hundred fifty".