616543655543 has 8 divisors (see below), whose sum is σ = 618601370112. Its totient is φ = 614487556216.

The previous prime is 616543655509. The next prime is 616543655549. The reversal of 616543655543 is 345556345616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 616543655543 - 2¹⁸ = 616543393399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616543655549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363296 + ... + 1168362.

It is an arithmetic number, because the mean of its divisors is an integer number (77325171264).

Almost surely, 2^616543655543 is an apocalyptic number.

616543655543 is a deficient number, since it is larger than the sum of its proper divisors (2057714569).

616543655543 is a wasteful number, since it uses less digits than its factorization.

616543655543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807621.

The product of its digits is 19440000, while the sum is 53.

The spelling of 616543655543 in words is "six hundred sixteen billion, five hundred forty-three million, six hundred fifty-five thousand, five hundred forty-three".