1254885785543 has 16 divisors (see below), whose sum is σ = 1366706960640. Its totient is φ = 1145251151616.

The previous prime is 1254885785533. The next prime is 1254885785611. The reversal of 1254885785543 is 3455875884521.

It is not a de Polignac number, because 1254885785543 - 2¹⁰ = 1254885784519 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 1254885785543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1254885785533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18068921 + ... + 18138237.

It is an arithmetic number, because the mean of its divisors is an integer number (85419185040).

Almost surely, 2^{1254885785543} is an apocalyptic number.

1254885785543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1254885785543 is a deficient number, since it is larger than the sum of its proper divisors (111821175097).

1254885785543 is a wasteful number, since it uses less digits than its factorization.

1254885785543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85066.

The product of its digits is 215040000, while the sum is 65.

The spelling of 1254885785543 in words is "one trillion, two hundred fifty-four billion, eight hundred eighty-five million, seven hundred eighty-five thousand, five hundred forty-three".