2644513212 has 48 divisors (see below), whose sum is σ = 6753100032. Its totient is φ = 798794880.

The previous prime is 2644513171. The next prime is 2644513237. The reversal of 2644513212 is 2123154462.

It is a self number, because there is not a number n which added to its sum of digits gives 2644513212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9313 + ... + 73319.

It is an arithmetic number, because the mean of its divisors is an integer number (140689584).

Almost surely, 2^2644513212 is an apocalyptic number.

2644513212 is a gapful number since it is divisible by the number (22) 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 2644513212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3376550016).

2644513212 is an abundant number, since it is smaller than the sum of its proper divisors (4108586820).

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

2644513212 is a wasteful number, since it uses less digits than its factorization.

2644513212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64338 (or 64336 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 2644513212 is about 51424.8306949085. The cubic root of 2644513212 is about 1382.8717785605.

Adding to 2644513212 its reverse (2123154462), we get a palindrome (4767667674).

The spelling of 2644513212 in words is "two billion, six hundred forty-four million, five hundred thirteen thousand, two hundred twelve".