5551571161 has 4 divisors (see below), whose sum is σ = 5571327924. Its totient is φ = 5531814400.

The previous prime is 5551571071. The next prime is 5551571167. The reversal of 5551571161 is 1611751555.

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 1380865600 + 4170705561 = 37160^2 + 64581^2 .

It is a cyclic number.

It is not a de Polignac number, because 5551571161 - 2⁷ = 5551571033 is a prime.

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 5551571161.

It is not an unprimeable number, because it can be changed into a prime (5551571167) 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, 9877960 + ... + 9878521.

It is an arithmetic number, because the mean of its divisors is an integer number (1392831981).

Almost surely, 2^5551571161 is an apocalyptic number.

It is an amenable number.

5551571161 is a deficient number, since it is larger than the sum of its proper divisors (19756763).

5551571161 is a wasteful number, since it uses less digits than its factorization.

5551571161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19756762.

The product of its digits is 26250, while the sum is 37.

The square root of 5551571161 is about 74508.8663247536. The cubic root of 5551571161 is about 1770.6741089415.

The spelling of 5551571161 in words is "five billion, five hundred fifty-one million, five hundred seventy-one thousand, one hundred sixty-one".