144781881139 has 8 divisors (see below), whose sum is σ = 165477200480. Its totient is φ = 124089610176.

The previous prime is 144781881137. The next prime is 144781881157. The reversal of 144781881139 is 931188187441.

It is a happy number.

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

It is not a de Polignac number, because 144781881139 - 2¹ = 144781881137 is a prime.

It is a super-2 number, since 2×144781881139² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144781881139.

It is not an unprimeable number, because it can be changed into a prime (144781881137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659394 + ... + 851095.

It is an arithmetic number, because the mean of its divisors is an integer number (20684650060).

Almost surely, 2^144781881139 is an apocalyptic number.

144781881139 is a deficient number, since it is larger than the sum of its proper divisors (20695319341).

144781881139 is a wasteful number, since it uses less digits than its factorization.

144781881139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524189.

The product of its digits is 1548288, while the sum is 55.

The spelling of 144781881139 in words is "one hundred forty-four billion, seven hundred eighty-one million, eight hundred eighty-one thousand, one hundred thirty-nine".