15444622145 has 16 divisors (see below), whose sum is σ = 19994020560. Its totient is φ = 11409475584.

The previous prime is 15444622139. The next prime is 15444622181. The reversal of 15444622145 is 54122644451.

It can be written as a sum of positive squares in 8 ways, for example, as 3836068096 + 11608554049 = 61936^2 + 107743^2 .

It is a cyclic number.

It is not a de Polignac number, because 15444622145 - 2³² = 11149654849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15444622099 and 15444622108.

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, 1709660 + ... + 1718669.

It is an arithmetic number, because the mean of its divisors is an integer number (1249626285).

Almost surely, 2^15444622145 is an apocalyptic number.

It is an amenable number.

15444622145 is a deficient number, since it is larger than the sum of its proper divisors (4549398415).

15444622145 is a wasteful number, since it uses less digits than its factorization.

15444622145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3428404.

The product of its digits is 153600, while the sum is 38.

The spelling of 15444622145 in words is "fifteen billion, four hundred forty-four million, six hundred twenty-two thousand, one hundred forty-five".