616560501561 has 8 divisors (see below), whose sum is σ = 830062034880. Its totient is φ = 407049651312.

The previous prime is 616560501551. The next prime is 616560501589. The reversal of 616560501561 is 165105065616.

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

It is not a de Polignac number, because 616560501561 - 2¹⁹ = 616559977273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (616560501541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 997670406 + ... + 997671023.

It is an arithmetic number, because the mean of its divisors is an integer number (103757754360).

Almost surely, 2^616560501561 is an apocalyptic number.

It is an amenable number.

616560501561 is a deficient number, since it is larger than the sum of its proper divisors (213501533319).

616560501561 is a wasteful number, since it uses less digits than its factorization.

616560501561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995341535.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 616560501561 in words is "six hundred sixteen billion, five hundred sixty million, five hundred one thousand, five hundred sixty-one".