6215268864 has 320 divisors, whose sum is σ = 20238704640. Its totient is φ = 1656668160.

The previous prime is 6215268859. The next prime is 6215268907. The reversal of 6215268864 is 4688625126.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9665727 + ... + 9666369.

It is an arithmetic number, because the mean of its divisors is an integer number (63245952).

Almost surely, 2^6215268864 is an apocalyptic number.

6215268864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6215268864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10119352320).

6215268864 is an abundant number, since it is smaller than the sum of its proper divisors (14023435776).

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

6215268864 is a wasteful number, since it uses less digits than its factorization.

6215268864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 715 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 48.

The square root of 6215268864 is about 78836.9765021465. The cubic root of 6215268864 is about 1838.5973935922.

The spelling of 6215268864 in words is "six billion, two hundred fifteen million, two hundred sixty-eight thousand, eight hundred sixty-four".