1565410841220 has 144 divisors (see below), whose sum is σ = 4806537660288. Its totient is φ = 379339376640.

The previous prime is 1565410841161. The next prime is 1565410841287. The reversal of 1565410841220 is 221480145651.

It is a happy number.

It is a super-2 number, since 2×1565410841220² (a number of 25 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 54616 + ... + 1770255.

It is an arithmetic number, because the mean of its divisors is an integer number (33378733752).

Almost surely, 2^{1565410841220} is an apocalyptic number.

1565410841220 is a gapful number since it is divisible by the number (10) 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 1565410841220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2403268830144).

1565410841220 is an abundant number, since it is smaller than the sum of its proper divisors (3241126819068).

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

1565410841220 is a wasteful number, since it uses less digits than its factorization.

1565410841220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824958 (or 1824927 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 39.

Adding to 1565410841220 its reverse (221480145651), we get a palindrome (1786890986871).

The spelling of 1565410841220 in words is "one trillion, five hundred sixty-five billion, four hundred ten million, eight hundred forty-one thousand, two hundred twenty".