5661551543 has 8 divisors (see below), whose sum is σ = 6104883120. Its totient is φ = 5232755520.

The previous prime is 5661551509. The next prime is 5661551549. The reversal of 5661551543 is 3451551665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5661551543 - 2¹⁶ = 5661486007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5661551543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661551549) 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 7 ways as a sum of consecutive naturals, for example, 3633080 + ... + 3634637.

It is an arithmetic number, because the mean of its divisors is an integer number (763110390).

Almost surely, 2^5661551543 is an apocalyptic number.

5661551543 is a deficient number, since it is larger than the sum of its proper divisors (443331577).

5661551543 is a wasteful number, since it uses less digits than its factorization.

5661551543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7267777.

The product of its digits is 270000, while the sum is 41.

The square root of 5661551543 is about 75243.2823778974. The cubic root of 5661551543 is about 1782.2904847486.

The spelling of 5661551543 in words is "five billion, six hundred sixty-one million, five hundred fifty-one thousand, five hundred forty-three".