16441621313 has 8 divisors (see below), whose sum is σ = 17709354600. Its totient is φ = 15174315648.

The previous prime is 16441621271. The next prime is 16441621319. The reversal of 16441621313 is 31312614461.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1773504769 + 14668116544 = 42113^2 + 121112^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16441621313 - 2¹² = 16441617217 is a prime.

It is a super-3 number, since 3×16441621313³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16441621313.

It is not an unprimeable number, because it can be changed into a prime (16441621319) 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, 24698 + ... + 183011.

It is an arithmetic number, because the mean of its divisors is an integer number (2213669325).

Almost surely, 2^16441621313 is an apocalyptic number.

16441621313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16441621313 is a deficient number, since it is larger than the sum of its proper divisors (1267733287).

16441621313 is a wasteful number, since it uses less digits than its factorization.

16441621313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213811.

The product of its digits is 10368, while the sum is 32.

The spelling of 16441621313 in words is "sixteen billion, four hundred forty-one million, six hundred twenty-one thousand, three hundred thirteen".