144781334478 has 48 divisors (see below), whose sum is σ = 344002194432. Its totient is φ = 43643418000.

The previous prime is 144781334473. The next prime is 144781334491. The reversal of 144781334478 is 874433187441.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144781334471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1876368 + ... + 1952003.

It is an arithmetic number, because the mean of its divisors is an integer number (7166712384).

Almost surely, 2^144781334478 is an apocalyptic number.

144781334478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

144781334478 is an abundant number, since it is smaller than the sum of its proper divisors (199220859954).

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

144781334478 is a wasteful number, since it uses less digits than its factorization.

144781334478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3828581 (or 3828578 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 54.

The spelling of 144781334478 in words is "one hundred forty-four billion, seven hundred eighty-one million, three hundred thirty-four thousand, four hundred seventy-eight".