2215648864 has 96 divisors (see below), whose sum is σ = 5290306560. Its totient is φ = 899596800.

The previous prime is 2215648861. The next prime is 2215648867. The reversal of 2215648864 is 4688465122.

It is an interprime number because it is at equal distance from previous prime (2215648861) and next prime (2215648867).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215648861) 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, 134047 + ... + 149665.

It is an arithmetic number, because the mean of its divisors is an integer number (55107360).

Almost surely, 2^2215648864 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 2215648864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2645153280).

2215648864 is an abundant number, since it is smaller than the sum of its proper divisors (3074657696).

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

2215648864 is a wasteful number, since it uses less digits than its factorization.

2215648864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15684 (or 15676 counting only the distinct ones).

The product of its digits is 737280, while the sum is 46.

The square root of 2215648864 is about 47070.6794512253. The cubic root of 2215648864 is about 1303.6679182482.

The spelling of 2215648864 in words is "two billion, two hundred fifteen million, six hundred forty-eight thousand, eight hundred sixty-four".