8867800561 has 3 divisors (see below), whose sum is σ = 8867894731. Its totient is φ = 8867706392.

The previous prime is 8867800537. The next prime is 8867800567. The reversal of 8867800561 is 1650087688.

The square root of 8867800561 is 94169.

It is a perfect power (a square), and thus also a powerful number.

8867800561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1683542961 + 7184257600 = 41031^2 + 84760^2 .

It is not a de Polignac number, because 8867800561 - 2¹³ = 8867792369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8867800567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 47085 + ... + 141253.

Almost surely, 2^8867800561 is an apocalyptic number.

8867800561 is the 94169-th square number.

8867800561 is the 47085-th centered octagonal number.

It is an amenable number.

8867800561 is a deficient number, since it is larger than the sum of its proper divisors (94170).

8867800561 is an frugal number, since it uses more digits than its factorization.

8867800561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188338 (or 94169 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 49.

The cubic root of 8867800561 is about 2069.8488816687.

Multiplying 8867800561 by its sum of digits (49), we get a square (434522227489 = 659183²).

The spelling of 8867800561 in words is "eight billion, eight hundred sixty-seven million, eight hundred thousand, five hundred sixty-one".