144521561138 has 16 divisors (see below), whose sum is σ = 219131784960. Its totient is φ = 71479818576.

The previous prime is 144521561099. The next prime is 144521561201. The reversal of 144521561138 is 831165125441.

It is a junction number, because it is equal to n+sod(n) for n = 144521561095 and 144521561104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413756 + ... + 678407.

It is an arithmetic number, because the mean of its divisors is an integer number (13695736560).

Almost surely, 2^144521561138 is an apocalyptic number.

144521561138 is a deficient number, since it is larger than the sum of its proper divisors (74610223822).

144521561138 is a wasteful number, since it uses less digits than its factorization.

144521561138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092881.

The product of its digits is 115200, while the sum is 41.

Adding to 144521561138 its reverse (831165125441), we get a palindrome (975686686579).

The spelling of 144521561138 in words is "one hundred forty-four billion, five hundred twenty-one million, five hundred sixty-one thousand, one hundred thirty-eight".