1538656188273 has 6 divisors (see below), whose sum is σ = 2222503383074. Its totient is φ = 1025770792176.

The previous prime is 1538656188257. The next prime is 1538656188301. The reversal of 1538656188273 is 3728816568351.

1538656188273 is a `hidden beast` number, since 1 + 5 + 3 + 8 + 6 + 5 + 618 + 8 + 2 + 7 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1320070017249 + 218586171024 = 1148943^2 + 467532^2 .

It is not a de Polignac number, because 1538656188273 - 2⁴ = 1538656188257 is a prime.

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 1538656188273.

It is not an unprimeable number, because it can be changed into a prime (1538656188973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85480899340 + ... + 85480899357.

Almost surely, 2^{1538656188273} is an apocalyptic number.

It is an amenable number.

1538656188273 is a deficient number, since it is larger than the sum of its proper divisors (683847194801).

1538656188273 is a wasteful number, since it uses less digits than its factorization.

1538656188273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170961798703 (or 170961798700 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 63.

The spelling of 1538656188273 in words is "one trillion, five hundred thirty-eight billion, six hundred fifty-six million, one hundred eighty-eight thousand, two hundred seventy-three".