6553037561 has 4 divisors (see below), whose sum is σ = 7489185792. Its totient is φ = 5616889332.

The previous prime is 6553037537. The next prime is 6553037581. The reversal of 6553037561 is 1657303556.

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 a de Polignac number, because none of the positive numbers 2^k-6553037561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6553037521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468074105 + ... + 468074118.

It is an arithmetic number, because the mean of its divisors is an integer number (1872296448).

Almost surely, 2^6553037561 is an apocalyptic number.

It is an amenable number.

6553037561 is a deficient number, since it is larger than the sum of its proper divisors (936148231).

6553037561 is an equidigital number, since it uses as much as digits as its factorization.

6553037561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936148230.

The product of its (nonzero) digits is 283500, while the sum is 41.

The square root of 6553037561 is about 80950.8342205317. The cubic root of 6553037561 is about 1871.3178163670.

The spelling of 6553037561 in words is "six billion, five hundred fifty-three million, thirty-seven thousand, five hundred sixty-one".