42728541245 has 30 divisors (see below), whose sum is σ = 55648688022. Its totient is φ = 31495699872.

The previous prime is 42728541239. The next prime is 42728541257. The reversal of 42728541245 is 54214582724.

It can be written as a sum of positive squares in 5 ways, for example, as 38347822276 + 4380718969 = 195826^2 + 66187^2 .

It is not a de Polignac number, because 42728541245 - 2¹⁶ = 42728475709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42728541196 and 42728541205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 78114062 + ... + 78114608.

Almost surely, 2^42728541245 is an apocalyptic number.

It is an amenable number.

42728541245 is a deficient number, since it is larger than the sum of its proper divisors (12920146777).

42728541245 is an frugal number, since it uses more digits than its factorization.

42728541245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 565 counting only the distinct ones).

The product of its digits is 716800, while the sum is 44.

The spelling of 42728541245 in words is "forty-two billion, seven hundred twenty-eight million, five hundred forty-one thousand, two hundred forty-five".