2145324456 has 96 divisors (see below), whose sum is σ = 6433221600. Its totient is φ = 640379520.

The previous prime is 2145324451. The next prime is 2145324473. The reversal of 2145324456 is 6544235412.

It is a super-3 number, since 3×2145324456³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2145324456.

It is not an unprimeable number, because it can be changed into a prime (2145324451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32850 + ... + 73278.

It is an arithmetic number, because the mean of its divisors is an integer number (67012725).

Almost surely, 2^2145324456 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 2145324456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3216610800).

2145324456 is an abundant number, since it is smaller than the sum of its proper divisors (4287897144).

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

2145324456 is a wasteful number, since it uses less digits than its factorization.

2145324456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40519 (or 40512 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The square root of 2145324456 is about 46317.6473495794. The cubic root of 2145324456 is about 1289.7266123377.

Adding to 2145324456 its reverse (6544235412), we get a palindrome (8689559868).

The spelling of 2145324456 in words is "two billion, one hundred forty-five million, three hundred twenty-four thousand, four hundred fifty-six".