6440086426808 has 128 divisors (see below), whose sum is σ = 12975621120000. Its totient is φ = 2991129942528.

The previous prime is 6440086426799. The next prime is 6440086426817. The reversal of 6440086426808 is 8086246800446.

It is an interprime number because it is at equal distance from previous prime (6440086426799) and next prime (6440086426817).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197247941 + ... + 197280587.

It is an arithmetic number, because the mean of its divisors is an integer number (101372040000).

Almost surely, 2^{6440086426808} is an apocalyptic number.

It is an amenable number.

6440086426808 is an abundant number, since it is smaller than the sum of its proper divisors (6535534693192).

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

6440086426808 is a wasteful number, since it uses less digits than its factorization.

6440086426808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33037 (or 33033 counting only the distinct ones).

The product of its (nonzero) digits is 14155776, while the sum is 56.

The spelling of 6440086426808 in words is "six trillion, four hundred forty billion, eighty-six million, four hundred twenty-six thousand, eight hundred eight".