616550505663 has 4 divisors (see below), whose sum is σ = 822067340888. Its totient is φ = 411033670440.

The previous prime is 616550505661. The next prime is 616550505667. The reversal of 616550505663 is 366505055616.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 616550505663 - 2¹ = 616550505661 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 (616550505661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102758417608 + ... + 102758417613.

It is an arithmetic number, because the mean of its divisors is an integer number (205516835222).

Almost surely, 2^616550505663 is an apocalyptic number.

616550505663 is a deficient number, since it is larger than the sum of its proper divisors (205516835225).

616550505663 is a wasteful number, since it uses less digits than its factorization.

616550505663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205516835224.

The product of its (nonzero) digits is 2430000, while the sum is 48.

The spelling of 616550505663 in words is "six hundred sixteen billion, five hundred fifty million, five hundred five thousand, six hundred sixty-three".