6436161967 has 4 divisors (see below), whose sum is σ = 6715995120. Its totient is φ = 6156328816.

The previous prime is 6436161961. The next prime is 6436161989. The reversal of 6436161967 is 7691616346.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6436161967 - 2³ = 6436161959 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 6436161967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6436161961) 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, 139916542 + ... + 139916587.

It is an arithmetic number, because the mean of its divisors is an integer number (1678998780).

Almost surely, 2^6436161967 is an apocalyptic number.

6436161967 is a deficient number, since it is larger than the sum of its proper divisors (279833153).

6436161967 is a wasteful number, since it uses less digits than its factorization.

6436161967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279833152.

The product of its digits is 979776, while the sum is 49.

The square root of 6436161967 is about 80225.6939328043. The cubic root of 6436161967 is about 1860.1258217386.

The spelling of 6436161967 in words is "six billion, four hundred thirty-six million, one hundred sixty-one thousand, nine hundred sixty-seven".