1225840784752 has 160 divisors (see below), whose sum is σ = 2722433431680. Its totient is φ = 531221053440.

The previous prime is 1225840784747. The next prime is 1225840784771. The reversal of 1225840784752 is 2574870485221.

It is a super-2 number, since 2×1225840784752² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1225840784693 and 1225840784702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64033102 + ... + 64052242.

It is an arithmetic number, because the mean of its divisors is an integer number (17015208948).

Almost surely, 2^{1225840784752} 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 1225840784752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1361216715840).

1225840784752 is an abundant number, since it is smaller than the sum of its proper divisors (1496592646928).

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

1225840784752 is a wasteful number, since it uses less digits than its factorization.

1225840784752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19571 (or 19565 counting only the distinct ones).

The product of its (nonzero) digits is 10035200, while the sum is 55.

The spelling of 1225840784752 in words is "one trillion, two hundred twenty-five billion, eight hundred forty million, seven hundred eighty-four thousand, seven hundred fifty-two".