402044234413 has 4 divisors (see below), whose sum is σ = 402046032700. Its totient is φ = 402042436128.

The previous prime is 402044234377. The next prime is 402044234441. The reversal of 402044234413 is 314432440204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 75434270409 + 326609964004 = 274653^2 + 571498^2 .

It is a cyclic number.

It is not a de Polignac number, because 402044234413 - 2²¹ = 402042137261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402044234483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506688 + ... + 1029961.

It is an arithmetic number, because the mean of its divisors is an integer number (100511508175).

Almost surely, 2^402044234413 is an apocalyptic number.

It is an amenable number.

402044234413 is a deficient number, since it is larger than the sum of its proper divisors (1798287).

402044234413 is a wasteful number, since it uses less digits than its factorization.

402044234413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798286.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 402044234413 its reverse (314432440204), we get a palindrome (716476674617).

The spelling of 402044234413 in words is "four hundred two billion, forty-four million, two hundred thirty-four thousand, four hundred thirteen".