16405218259 has 8 divisors (see below), whose sum is σ = 17294727168. Its totient is φ = 15538228680.

The previous prime is 16405218253. The next prime is 16405218367. The reversal of 16405218259 is 95281250461.

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 16405218259 - 2¹⁷ = 16405087187 is a prime.

It is a super-2 number, since 2×16405218259² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16405218253) 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, 5628337 + ... + 5631250.

It is an arithmetic number, because the mean of its divisors is an integer number (2161840896).

Almost surely, 2^16405218259 is an apocalyptic number.

16405218259 is a deficient number, since it is larger than the sum of its proper divisors (889508909).

16405218259 is a wasteful number, since it uses less digits than its factorization.

16405218259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11259665.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 16405218259 in words is "sixteen billion, four hundred five million, two hundred eighteen thousand, two hundred fifty-nine".