402144441409 has 16 divisors (see below), whose sum is σ = 426777595200. Its totient is φ = 377620472320.

The previous prime is 402144441397. The next prime is 402144441539. The reversal of 402144441409 is 904144441204.

It is not a de Polignac number, because 402144441409 - 2⁹ = 402144440897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402144441109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29212362 + ... + 29226124.

It is an arithmetic number, because the mean of its divisors is an integer number (26673599700).

Almost surely, 2^402144441409 is an apocalyptic number.

It is an amenable number.

402144441409 is a deficient number, since it is larger than the sum of its proper divisors (24633153791).

402144441409 is a wasteful number, since it uses less digits than its factorization.

402144441409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17600.

The product of its (nonzero) digits is 73728, while the sum is 37.

The spelling of 402144441409 in words is "four hundred two billion, one hundred forty-four million, four hundred forty-one thousand, four hundred nine".