402144432001 has 4 divisors (see below), whose sum is σ = 433078619092. Its totient is φ = 371210244912.

The previous prime is 402144431989. The next prime is 402144432013. The reversal of 402144432001 is 100234441204.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (402144431989) and next prime (402144432013).

It can be written as a sum of positive squares in 2 ways, for example, as 80655432001 + 321489000000 = 283999^2 + 567000^2 .

It is not a de Polignac number, because 402144432001 - 2⁹ = 402144431489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402144402001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15467093526 + ... + 15467093551.

It is an arithmetic number, because the mean of its divisors is an integer number (108269654773).

Almost surely, 2^402144432001 is an apocalyptic number.

It is an amenable number.

402144432001 is a deficient number, since it is larger than the sum of its proper divisors (30934187091).

402144432001 is a wasteful number, since it uses less digits than its factorization.

402144432001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30934187090.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 402144432001 its reverse (100234441204), we get a palindrome (502378873205).

The spelling of 402144432001 in words is "four hundred two billion, one hundred forty-four million, four hundred thirty-two thousand, one".