402205040642 has 8 divisors (see below), whose sum is σ = 604248760332. Its totient is φ = 200788787200.

The previous prime is 402205040579. The next prime is 402205040647. The reversal of 402205040642 is 246040502204.

It can be written as a sum of positive squares in 2 ways, for example, as 398601559801 + 3603480841 = 631349^2 + 60029^2 .

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

It is not an unprimeable number, because it can be changed into a prime (402205040647) 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, 156864959 + ... + 156867522.

Almost surely, 2^402205040642 is an apocalyptic number.

402205040642 is a deficient number, since it is larger than the sum of its proper divisors (202043719690).

402205040642 is a wasteful number, since it uses less digits than its factorization.

402205040642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313733124.

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 402205040642 its reverse (246040502204), we get a palindrome (648245542846).

The spelling of 402205040642 in words is "four hundred two billion, two hundred five million, forty thousand, six hundred forty-two".