16401624065403 has 8 divisors (see below), whose sum is σ = 21870122884608. Its totient is φ = 10933770644904.

The previous prime is 16401624065381. The next prime is 16401624065429. The reversal of 16401624065403 is 30456042610461.

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

It is not a de Polignac number, because 16401624065403 - 2¹⁸ = 16401623803259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16401624065483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161290375 + ... + 161392032.

It is an arithmetic number, because the mean of its divisors is an integer number (2733765360576).

Almost surely, 2^{16401624065403} is an apocalyptic number.

16401624065403 is a deficient number, since it is larger than the sum of its proper divisors (5468498819205).

16401624065403 is a wasteful number, since it uses less digits than its factorization.

16401624065403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322699353.

The product of its (nonzero) digits is 414720, while the sum is 42.

Adding to 16401624065403 its reverse (30456042610461), we get a palindrome (46857666675864).

The spelling of 16401624065403 in words is "sixteen trillion, four hundred one billion, six hundred twenty-four million, sixty-five thousand, four hundred three".