5651111000561 has 4 divisors (see below), whose sum is σ = 6085811846772. Its totient is φ = 5216410154352.

The previous prime is 5651111000539. The next prime is 5651111000609. The reversal of 5651111000561 is 1650001111565.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2803012608400 + 2848098392161 = 1674220^2 + 1687631^2 .

It is a cyclic number.

It is not a de Polignac number, because 5651111000561 - 2¹⁴ = 5651110984177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5651111008561) 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, 217350423086 + ... + 217350423111.

It is an arithmetic number, because the mean of its divisors is an integer number (1521452961693).

Almost surely, 2^{5651111000561} is an apocalyptic number.

It is an amenable number.

5651111000561 is a deficient number, since it is larger than the sum of its proper divisors (434700846211).

5651111000561 is a wasteful number, since it uses less digits than its factorization.

5651111000561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434700846210.

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 5651111000561 in words is "five trillion, six hundred fifty-one billion, one hundred eleven million, five hundred sixty-one", and thus it is an aban number.