16400423201 has 8 divisors (see below), whose sum is σ = 16429324200. Its totient is φ = 16371548928.

The previous prime is 16400423177. The next prime is 16400423203. The reversal of 16400423201 is 10232400461.

It can be written as a sum of positive squares in 4 ways, for example, as 2752576225 + 13647846976 = 52465^2 + 116824^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16400423201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16400423203) 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, 1507955 + ... + 1518791.

It is an arithmetic number, because the mean of its divisors is an integer number (2053665525).

Almost surely, 2^16400423201 is an apocalyptic number.

It is an amenable number.

16400423201 is a deficient number, since it is larger than the sum of its proper divisors (28900999).

16400423201 is a wasteful number, since it uses less digits than its factorization.

16400423201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13363.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 16400423201 its reverse (10232400461), we get a palindrome (26632823662).

The spelling of 16400423201 in words is "sixteen billion, four hundred million, four hundred twenty-three thousand, two hundred one".