144781878538 has 8 divisors (see below), whose sum is σ = 236915801280. Its totient is φ = 65809944780.

The previous prime is 144781878503. The next prime is 144781878539. The reversal of 144781878538 is 835878187441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 144781878538.

It is not an unprimeable number, because it can be changed into a prime (144781878539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3290497218 + ... + 3290497261.

It is an arithmetic number, because the mean of its divisors is an integer number (29614475160).

Almost surely, 2^144781878538 is an apocalyptic number.

144781878538 is a deficient number, since it is larger than the sum of its proper divisors (92133922742).

144781878538 is a wasteful number, since it uses less digits than its factorization.

144781878538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6580994492.

The product of its digits is 48168960, while the sum is 64.

The spelling of 144781878538 in words is "one hundred forty-four billion, seven hundred eighty-one million, eight hundred seventy-eight thousand, five hundred thirty-eight".