6550051561 has 4 divisors (see below), whose sum is σ = 6550429824. Its totient is φ = 6549673300.

The previous prime is 6550051559. The next prime is 6550051591. The reversal of 6550051561 is 1651500556.

6550051561 is digitally balanced in base 3, 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6550051561 - 2¹ = 6550051559 is a prime.

It is a super-3 number, since 3×6550051561³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6550051531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161845 + ... + 198226.

It is an arithmetic number, because the mean of its divisors is an integer number (1637607456).

Almost surely, 2^6550051561 is an apocalyptic number.

It is an amenable number.

6550051561 is a deficient number, since it is larger than the sum of its proper divisors (378263).

6550051561 is a wasteful number, since it uses less digits than its factorization.

6550051561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378262.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 6550051561 is about 80932.3888254882. The cubic root of 6550051561 is about 1871.0335408749.

The spelling of 6550051561 in words is "six billion, five hundred fifty million, fifty-one thousand, five hundred sixty-one".