6538165867 has 32 divisors (see below), whose sum is σ = 7221125120. Its totient is φ = 5898251520.

The previous prime is 6538165849. The next prime is 6538165871. The reversal of 6538165867 is 7685618356.

It is not a de Polignac number, because 6538165867 - 2¹⁵ = 6538133099 is a prime.

It is a super-2 number, since 2×6538165867² = 85495225808807723378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6538165567) 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 31 ways as a sum of consecutive naturals, for example, 6328783 + ... + 6329815.

It is an arithmetic number, because the mean of its divisors is an integer number (225660160).

Almost surely, 2^6538165867 is an apocalyptic number.

6538165867 is a deficient number, since it is larger than the sum of its proper divisors (682959253).

6538165867 is a wasteful number, since it uses less digits than its factorization.

6538165867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283.

The product of its digits is 7257600, while the sum is 55.

The square root of 6538165867 is about 80858.9257101527. The cubic root of 6538165867 is about 1869.9011326379.

The spelling of 6538165867 in words is "six billion, five hundred thirty-eight million, one hundred sixty-five thousand, eight hundred sixty-seven".