16401063 has 8 divisors (see below), whose sum is σ = 24992128. Its totient is φ = 9372024.

The previous prime is 16401061. The next prime is 16401083. The reversal of 16401063 is 36010461.

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

It is not a de Polignac number, because 16401063 - 2¹ = 16401061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 781003 = 16401063 / (1 + 6 + 4 + 0 + 1 + 0 + 6 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16401061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390481 + ... + 390522.

It is an arithmetic number, because the mean of its divisors is an integer number (3124016).

Almost surely, 2^16401063 is an apocalyptic number.

16401063 is a deficient number, since it is larger than the sum of its proper divisors (8591065).

16401063 is an equidigital number, since it uses as much as digits as its factorization.

16401063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781013.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 16401063 is about 4049.8225887068. The cubic root of 16401063 is about 254.0723077251.

The spelling of 16401063 in words is "sixteen million, four hundred one thousand, sixty-three".