1655918198543 has 16 divisors (see below), whose sum is σ = 1992241655040. Its totient is φ = 1344547641600.

The previous prime is 1655918198513. The next prime is 1655918198567. The reversal of 1655918198543 is 3458918195561.

It is a cyclic number.

It is not a de Polignac number, because 1655918198543 - 2⁶ = 1655918198479 is a prime.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1655918198543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655918198503) 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, 1188788 + ... + 2173718.

It is an arithmetic number, because the mean of its divisors is an integer number (124515103440).

Almost surely, 2^{1655918198543} is an apocalyptic number.

1655918198543 is a deficient number, since it is larger than the sum of its proper divisors (336323456497).

1655918198543 is a wasteful number, since it uses less digits than its factorization.

1655918198543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997598.

The product of its digits is 46656000, while the sum is 65.

The spelling of 1655918198543 in words is "one trillion, six hundred fifty-five billion, nine hundred eighteen million, one hundred ninety-eight thousand, five hundred forty-three".