402253840309 has 4 divisors (see below), whose sum is σ = 410812432704. Its totient is φ = 393695247916.

The previous prime is 402253840259. The next prime is 402253840321. The reversal of 402253840309 is 903048352204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 402253840309 - 2⁹ = 402253839797 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 (402253840409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4279296127 + ... + 4279296220.

It is an arithmetic number, because the mean of its divisors is an integer number (102703108176).

Almost surely, 2^402253840309 is an apocalyptic number.

It is an amenable number.

402253840309 is a deficient number, since it is larger than the sum of its proper divisors (8558592395).

402253840309 is an equidigital number, since it uses as much as digits as its factorization.

402253840309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8558592394.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 402253840309 in words is "four hundred two billion, two hundred fifty-three million, eight hundred forty thousand, three hundred nine".