6440316285 has 64 divisors (see below), whose sum is σ = 11966411520. Its totient is φ = 2930411520.

The previous prime is 6440316263. The next prime is 6440316293. The reversal of 6440316285 is 5826130446.

It is not a de Polignac number, because 6440316285 - 2⁶ = 6440316221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 130707 + ... + 173103.

It is an arithmetic number, because the mean of its divisors is an integer number (186975180).

Almost surely, 2^6440316285 is an apocalyptic number.

6440316285 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6440316285 is a deficient number, since it is larger than the sum of its proper divisors (5526095235).

6440316285 is a wasteful number, since it uses less digits than its factorization.

6440316285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42478.

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 6440316285 is about 80251.5811993758. The cubic root of 6440316285 is about 1860.5259511012.

The spelling of 6440316285 in words is "six billion, four hundred forty million, three hundred sixteen thousand, two hundred eighty-five".