6400497712 has 80 divisors (see below), whose sum is σ = 14740540672. Its totient is φ = 2635234560.

The previous prime is 6400497679. The next prime is 6400497713. The reversal of 6400497712 is 2177940046.

It is a super-2 number, since 2×6400497712² = 81932741922634469888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6400497713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282883 + ... + 304669.

Almost surely, 2^6400497712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6400497712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7370270336).

6400497712 is an abundant number, since it is smaller than the sum of its proper divisors (8340042960).

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

6400497712 is a wasteful number, since it uses less digits than its factorization.

6400497712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21906 (or 21900 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 6400497712 is about 80003.1106395245. The cubic root of 6400497712 is about 1856.6836608322.

The spelling of 6400497712 in words is "six billion, four hundred million, four hundred ninety-seven thousand, seven hundred twelve".