616618080961 has 4 divisors (see below), whose sum is σ = 616709289924. Its totient is φ = 616526872000.

The previous prime is 616618080959. The next prime is 616618080979. The reversal of 616618080961 is 169080816616.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 358853713936 + 257764367025 = 599044^2 + 507705^2 .

It is a cyclic number.

It is not a de Polignac number, because 616618080961 - 2¹ = 616618080959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 616618080899 and 616618080908.

It is not an unprimeable number, because it can be changed into a prime (616618080901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45594340 + ... + 45607861.

It is an arithmetic number, because the mean of its divisors is an integer number (154177322481).

Almost surely, 2^616618080961 is an apocalyptic number.

It is an amenable number.

616618080961 is a deficient number, since it is larger than the sum of its proper divisors (91208963).

616618080961 is an equidigital number, since it uses as much as digits as its factorization.

616618080961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91208962.

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 616618080961 in words is "six hundred sixteen billion, six hundred eighteen million, eighty thousand, nine hundred sixty-one".