6464253216 has 48 divisors (see below), whose sum is σ = 16985541888. Its totient is φ = 2152608000.

The previous prime is 6464253209. The next prime is 6464253217. The reversal of 6464253216 is 6123524646.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (6464253217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65041 + ... + 130991.

It is an arithmetic number, because the mean of its divisors is an integer number (353865456).

Almost surely, 2^6464253216 is an apocalyptic number.

It is an amenable number.

6464253216 is an abundant number, since it is smaller than the sum of its proper divisors (10521288672).

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

6464253216 is a wasteful number, since it uses less digits than its factorization.

6464253216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66985 (or 66977 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The square root of 6464253216 is about 80400.5796994027. The cubic root of 6464253216 is about 1862.8281268410.

The spelling of 6464253216 in words is "six billion, four hundred sixty-four million, two hundred fifty-three thousand, two hundred sixteen".