6440306404254 has 16 divisors (see below), whose sum is σ = 12890363477520. Its totient is φ = 2145143689920.

The previous prime is 6440306404199. The next prime is 6440306404331. The reversal of 6440306404254 is 4524046030446.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 406269289 + ... + 406285140.

It is an arithmetic number, because the mean of its divisors is an integer number (805647717345).

Almost surely, 2^{6440306404254} is an apocalyptic number.

6440306404254 is an abundant number, since it is smaller than the sum of its proper divisors (6450057073266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6440306404254 is a wasteful number, since it uses less digits than its factorization.

6440306404254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812555755.

The product of its (nonzero) digits is 1105920, while the sum is 42.

The spelling of 6440306404254 in words is "six trillion, four hundred forty billion, three hundred six million, four hundred four thousand, two hundred fifty-four".