16540320413 has 8 divisors (see below), whose sum is σ = 17075517696. Its totient is φ = 16005225600.

The previous prime is 16540320347. The next prime is 16540320457. The reversal of 16540320413 is 31402304561.

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

It is a de Polignac number, because none of the positive numbers 2^k-16540320413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16540320463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433070 + ... + 469712.

It is an arithmetic number, because the mean of its divisors is an integer number (2134439712).

Almost surely, 2^16540320413 is an apocalyptic number.

It is an amenable number.

16540320413 is a deficient number, since it is larger than the sum of its proper divisors (535197283).

16540320413 is a wasteful number, since it uses less digits than its factorization.

16540320413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51235.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 16540320413 its reverse (31402304561), we get a palindrome (47942624974).

The spelling of 16540320413 in words is "sixteen billion, five hundred forty million, three hundred twenty thousand, four hundred thirteen".