1247855953359 has 16 divisors (see below), whose sum is σ = 1672655516000. Its totient is φ = 827491838976.

The previous prime is 1247855953303. The next prime is 1247855953367. The reversal of 1247855953359 is 9533595587421.

It is not a de Polignac number, because 1247855953359 - 2¹⁹ = 1247855429071 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 1247855953359.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247855953559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1028794 + ... + 1885239.

It is an arithmetic number, because the mean of its divisors is an integer number (104540969750).

Almost surely, 2^{1247855953359} is an apocalyptic number.

1247855953359 is a deficient number, since it is larger than the sum of its proper divisors (424799562641).

1247855953359 is a wasteful number, since it uses less digits than its factorization.

1247855953359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2914794.

The product of its digits is 204120000, while the sum is 66.

The spelling of 1247855953359 in words is "one trillion, two hundred forty-seven billion, eight hundred fifty-five million, nine hundred fifty-three thousand, three hundred fifty-nine".