6440845088 has 48 divisors (see below), whose sum is σ = 12874800960. Its totient is φ = 3171168000.

The previous prime is 6440845051. The next prime is 6440845091. The reversal of 6440845088 is 8805480446.

It is a happy number.

It is a super-2 number, since 2×6440845088² = 82968970895227455488, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2954783 + ... + 2956961.

It is an arithmetic number, because the mean of its divisors is an integer number (268225020).

Almost surely, 2^6440845088 is an apocalyptic number.

It is an amenable number.

6440845088 is a deficient number, since it is larger than the sum of its proper divisors (6433955872).

6440845088 is a wasteful number, since it uses less digits than its factorization.

6440845088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561 (or 3553 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 47.

The square root of 6440845088 is about 80254.8757895743. The cubic root of 6440845088 is about 1860.5768712080.

The spelling of 6440845088 in words is "six billion, four hundred forty million, eight hundred forty-five thousand, eighty-eight".