616565521003 has 16 divisors (see below), whose sum is σ = 658235842560. Its totient is φ = 575513769600.

The previous prime is 616565520979. The next prime is 616565521031. The reversal of 616565521003 is 300125565616.

It is a cyclic number.

It is not a de Polignac number, because 616565521003 - 2²⁹ = 616028650091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616565521303) 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, 787918 + ... + 1361596.

It is an arithmetic number, because the mean of its divisors is an integer number (41139740160).

Almost surely, 2^616565521003 is an apocalyptic number.

616565521003 is a deficient number, since it is larger than the sum of its proper divisors (41670321557).

616565521003 is a wasteful number, since it uses less digits than its factorization.

616565521003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574218.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 616565521003 in words is "six hundred sixteen billion, five hundred sixty-five million, five hundred twenty-one thousand, three".