5531856161 has 16 divisors (see below), whose sum is σ = 6108894288. Its totient is φ = 4976716800.

The previous prime is 5531856119. The next prime is 5531856167. The reversal of 5531856161 is 1616581355.

It can be written as a sum of positive squares in 8 ways, for example, as 1072955536 + 4458900625 = 32756^2 + 66775^2 .

It is a cyclic number.

It is not a de Polignac number, because 5531856161 - 2²² = 5527661857 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 Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5531856167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579971 + ... + 589431.

It is an arithmetic number, because the mean of its divisors is an integer number (381805893).

Almost surely, 2^5531856161 is an apocalyptic number.

It is an amenable number.

5531856161 is a deficient number, since it is larger than the sum of its proper divisors (577038127).

5531856161 is a wasteful number, since it uses less digits than its factorization.

5531856161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10612.

The product of its digits is 108000, while the sum is 41.

The square root of 5531856161 is about 74376.4489673983. The cubic root of 5531856161 is about 1768.5755891970.

The spelling of 5531856161 in words is "five billion, five hundred thirty-one million, eight hundred fifty-six thousand, one hundred sixty-one".