6439481316 has 24 divisors (see below), whose sum is σ = 16694951840. Its totient is φ = 2146493736.

The previous prime is 6439481299. The next prime is 6439481351. The reversal of 6439481316 is 6131849346.

It is a super-2 number, since 2×6439481316² = 82933839238226183712, 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, 29812306 + ... + 29812521.

Almost surely, 2^6439481316 is an apocalyptic number.

It is an amenable number.

6439481316 is an abundant number, since it is smaller than the sum of its proper divisors (10255470524).

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

6439481316 is a wasteful number, since it uses less digits than its factorization.

6439481316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59624840 (or 59624832 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 6439481316 is about 80246.3788341879. The cubic root of 6439481316 is about 1860.4455436303.

The spelling of 6439481316 in words is "six billion, four hundred thirty-nine million, four hundred eighty-one thousand, three hundred sixteen".