19485553022440 has 128 divisors (see below), whose sum is σ = 47420542540800. Its totient is φ = 7177933619200.

The previous prime is 19485553022417. The next prime is 19485553022497. The reversal of 19485553022440 is 4422035558491.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137005365 + ... + 137147515.

It is an arithmetic number, because the mean of its divisors is an integer number (370472988600).

Almost surely, 2^{19485553022440} is an apocalyptic number.

19485553022440 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 19485553022440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23710271270400).

19485553022440 is an abundant number, since it is smaller than the sum of its proper divisors (27934989518360).

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

19485553022440 is a wasteful number, since it uses less digits than its factorization.

19485553022440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146515 (or 146511 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 52.

The spelling of 19485553022440 in words is "nineteen trillion, four hundred eighty-five billion, five hundred fifty-three million, twenty-two thousand, four hundred forty".