6216720464 has 40 divisors (see below), whose sum is σ = 12379573728. Its totient is φ = 3022116480.

The previous prime is 6216720431. The next prime is 6216720473. The reversal of 6216720464 is 4640276126.

It is a super-2 number, since 2×6216720464² = 77295226655032750592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1031219 + ... + 1037229.

Almost surely, 2^6216720464 is an apocalyptic number.

It is an amenable number.

6216720464 is a deficient number, since it is larger than the sum of its proper divisors (6162853264).

6216720464 is a wasteful number, since it uses less digits than its factorization.

6216720464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7803 (or 7797 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 6216720464 is about 78846.1823045352. The cubic root of 6216720464 is about 1838.7405196196.

The spelling of 6216720464 in words is "six billion, two hundred sixteen million, seven hundred twenty thousand, four hundred sixty-four".