4145221452440 has 64 divisors (see below), whose sum is σ = 9484060793760. Its totient is φ = 1630147230720.

The previous prime is 4145221452409. The next prime is 4145221452487. The reversal of 4145221452440 is 442541225414.

It is a junction number, because it is equal to n+sod(n) for n = 4145221452394 and 4145221452403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4858787 + ... + 5647853.

Almost surely, 2^{4145221452440} is an apocalyptic number.

4145221452440 is a gapful number since it is divisible by the number (40) 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 4145221452440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4742030396880).

4145221452440 is an abundant number, since it is smaller than the sum of its proper divisors (5338839341320).

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

4145221452440 is a wasteful number, since it uses less digits than its factorization.

4145221452440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791292 (or 791288 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 38.

Adding to 4145221452440 its reverse (442541225414), we get a palindrome (4587762677854).

The spelling of 4145221452440 in words is "four trillion, one hundred forty-five billion, two hundred twenty-one million, four hundred fifty-two thousand, four hundred forty".