2215550234664 has 384 divisors, whose sum is σ = 7070480202240. Its totient is φ = 620409839616.

The previous prime is 2215550234663. The next prime is 2215550234683. The reversal of 2215550234664 is 4664320555122.

2215550234664 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 550 + 2 + 34 + 6 + 64 = 666.

It is not an unprimeable number, because it can be changed into a prime (2215550234663) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 95953729 + ... + 95976815.

It is an arithmetic number, because the mean of its divisors is an integer number (18412708860).

Almost surely, 2^{2215550234664} is an apocalyptic number.

2215550234664 is a gapful number since it is divisible by the number (24) 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 2215550234664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3535240101120).

2215550234664 is an abundant number, since it is smaller than the sum of its proper divisors (4854929967576).

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

2215550234664 is a wasteful number, since it uses less digits than its factorization.

2215550234664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23329 (or 23322 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

Adding to 2215550234664 its reverse (4664320555122), we get a palindrome (6879870789786).

The spelling of 2215550234664 in words is "two trillion, two hundred fifteen billion, five hundred fifty million, two hundred thirty-four thousand, six hundred sixty-four".