5640436591138 has 8 divisors (see below), whose sum is σ = 8958340468332. Its totient is φ = 2654323101696.

The previous prime is 5640436591133. The next prime is 5640436591187. The reversal of 5640436591138 is 8311956340465.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5557462060329 + 82974530809 = 2357427^2 + 288053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (5640436591133) 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, 82947596895 + ... + 82947596962.

Almost surely, 2^{5640436591138} is an apocalyptic number.

5640436591138 is a deficient number, since it is larger than the sum of its proper divisors (3317903877194).

5640436591138 is a wasteful number, since it uses less digits than its factorization.

5640436591138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165895193876.

The product of its (nonzero) digits is 9331200, while the sum is 55.

The spelling of 5640436591138 in words is "five trillion, six hundred forty billion, four hundred thirty-six million, five hundred ninety-one thousand, one hundred thirty-eight".