616113561 has 16 divisors (see below), whose sum is σ = 969125888. Its totient is φ = 340707600.

The previous prime is 616113557. The next prime is 616113569. The reversal of 616113561 is 165311616.

It is not a de Polignac number, because 616113561 - 2² = 616113557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (616113569) 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, 472555 + ... + 473856.

It is an arithmetic number, because the mean of its divisors is an integer number (60570368).

Almost surely, 2^616113561 is an apocalyptic number.

It is an amenable number.

616113561 is a deficient number, since it is larger than the sum of its proper divisors (353012327).

616113561 is a wasteful number, since it uses less digits than its factorization.

616113561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946452.

The product of its digits is 3240, while the sum is 30.

The square root of 616113561 is about 24821.6349380938. The cubic root of 616113561 is about 850.9164560583.

The spelling of 616113561 in words is "six hundred sixteen million, one hundred thirteen thousand, five hundred sixty-one".