6445607800 has 48 divisors (see below), whose sum is σ = 15867578160. Its totient is φ = 2426580480.

The previous prime is 6445607771. The next prime is 6445607807. The reversal of 6445607800 is 87065446.

It is a super-2 number, since 2×6445607800² = 83091719822841680000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445607807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 944484 + ... + 951283.

It is an arithmetic number, because the mean of its divisors is an integer number (330574545).

Almost surely, 2^6445607800 is an apocalyptic number.

It is an amenable number.

6445607800 is an abundant number, since it is smaller than the sum of its proper divisors (9421970360).

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

6445607800 is a wasteful number, since it uses less digits than its factorization.

6445607800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895800 (or 1895791 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 6445607800 is about 80284.5427214978. The cubic root of 6445607800 is about 1861.0353622066.

The spelling of 6445607800 in words is "six billion, four hundred forty-five million, six hundred seven thousand, eight hundred".