616775084521 has 8 divisors (see below), whose sum is σ = 617198370984. Its totient is φ = 616351948800.

The previous prime is 616775084509. The next prime is 616775084537. The reversal of 616775084521 is 125480577616.

It can be written as a sum of positive squares in 4 ways, for example, as 315883341225 + 300891743296 = 562035^2 + 548536^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 616775084521 - 2¹³ = 616775076329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616775084501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8852421 + ... + 8921821.

It is an arithmetic number, because the mean of its divisors is an integer number (77149796373).

Almost surely, 2^616775084521 is an apocalyptic number.

It is an amenable number.

616775084521 is a deficient number, since it is larger than the sum of its proper divisors (423286463).

616775084521 is a wasteful number, since it uses less digits than its factorization.

616775084521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75371.

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 616775084521 in words is "six hundred sixteen billion, seven hundred seventy-five million, eighty-four thousand, five hundred twenty-one".