5166072581161 has 4 divisors (see below), whose sum is σ = 5166202327300. Its totient is φ = 5165942835024.

The previous prime is 5166072581147. The next prime is 5166072581167. The reversal of 5166072581161 is 1611852706615.

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 2112316331161 + 3053756250000 = 1453381^2 + 1747500^2 .

It is a cyclic number.

It is not a de Polignac number, because 5166072581161 - 2⁵ = 5166072581129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5166072581167) 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, 64813326 + ... + 64892983.

It is an arithmetic number, because the mean of its divisors is an integer number (1291550581825).

Almost surely, 2^{5166072581161} is an apocalyptic number.

It is an amenable number.

5166072581161 is a deficient number, since it is larger than the sum of its proper divisors (129746139).

5166072581161 is a wasteful number, since it uses less digits than its factorization.

5166072581161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129746138.

The product of its (nonzero) digits is 604800, while the sum is 49.

The spelling of 5166072581161 in words is "five trillion, one hundred sixty-six billion, seventy-two million, five hundred eighty-one thousand, one hundred sixty-one".