1225534120440 has 64 divisors (see below), whose sum is σ = 4201831272960. Its totient is φ = 280122084480.

The previous prime is 1225534120399. The next prime is 1225534120487. The reversal of 1225534120440 is 440214355221.

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, 729483756 + ... + 729485435.

It is an arithmetic number, because the mean of its divisors is an integer number (65653613640).

Almost surely, 2^{1225534120440} is an apocalyptic number.

1225534120440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225534120440 is an abundant number, since it is smaller than the sum of its proper divisors (2976297152520).

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

1225534120440 is a wasteful number, since it uses less digits than its factorization.

1225534120440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458969212 (or 1458969208 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 1225534120440 its reverse (440214355221), we get a palindrome (1665748475661).

The spelling of 1225534120440 in words is "one trillion, two hundred twenty-five billion, five hundred thirty-four million, one hundred twenty thousand, four hundred forty".