144720731406 has 32 divisors (see below), whose sum is σ = 296405452800. Its totient is φ = 47085173856.

The previous prime is 144720731341. The next prime is 144720731413. The reversal of 144720731406 is 604137027441.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 595681 + ... + 802668.

It is an arithmetic number, because the mean of its divisors is an integer number (9262670400).

Almost surely, 2^144720731406 is an apocalyptic number.

144720731406 is an abundant number, since it is smaller than the sum of its proper divisors (151684721394).

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

144720731406 is a wasteful number, since it uses less digits than its factorization.

144720731406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398768.

The product of its (nonzero) digits is 112896, while the sum is 39.

Adding to 144720731406 its reverse (604137027441), we get a palindrome (748857758847).

The spelling of 144720731406 in words is "one hundred forty-four billion, seven hundred twenty million, seven hundred thirty-one thousand, four hundred six".