6245578440 has 128 divisors (see below), whose sum is σ = 20837952000. Its totient is φ = 1663939584.

The previous prime is 6245578433. The next prime is 6245578453. The reversal of 6245578440 is 448755426.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1604016 + ... + 1607904.

It is an arithmetic number, because the mean of its divisors is an integer number (162796500).

Almost surely, 2^6245578440 is an apocalyptic number.

6245578440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6245578440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10418976000).

6245578440 is an abundant number, since it is smaller than the sum of its proper divisors (14592373560).

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

6245578440 is a wasteful number, since it uses less digits than its factorization.

6245578440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5396 (or 5386 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 45.

The square root of 6245578440 is about 79028.9721557860. The cubic root of 6245578440 is about 1841.5812690781.

The spelling of 6245578440 in words is "six billion, two hundred forty-five million, five hundred seventy-eight thousand, four hundred forty".