14540639581 has 8 divisors (see below), whose sum is σ = 15661096920. Its totient is φ = 13420460352.

The previous prime is 14540639579. The next prime is 14540639593. The reversal of 14540639581 is 18593604541.

14540639581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 250588900 + 14290050681 = 15830^2 + 119541^2 .

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

It is not a de Polignac number, because 14540639581 - 2¹ = 14540639579 is a prime.

It is a super-2 number, since 2×14540639581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14540639521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46215 + ... + 176683.

It is an arithmetic number, because the mean of its divisors is an integer number (1957637115).

Almost surely, 2^14540639581 is an apocalyptic number.

It is an amenable number.

14540639581 is a deficient number, since it is larger than the sum of its proper divisors (1120457339).

14540639581 is a wasteful number, since it uses less digits than its factorization.

14540639581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139055.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 14540639581 in words is "fourteen billion, five hundred forty million, six hundred thirty-nine thousand, five hundred eighty-one".