616846815661081 has 16 divisors (see below), whose sum is σ = 688079732938560. Its totient is φ = 549547872537600.

The previous prime is 616846815661051. The next prime is 616846815661123. The reversal of 616846815661081 is 180166518648616.

It is a cyclic number.

It is not a de Polignac number, because 616846815661081 - 2¹³ = 616846815652889 is a prime.

It is a super-2 number, since 2×616846815661081² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 616846815660998 and 616846815661016.

It is not an unprimeable number, because it can be changed into a prime (616846815661051) 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 15 ways as a sum of consecutive naturals, for example, 794675551 + ... + 795451396.

It is an arithmetic number, because the mean of its divisors is an integer number (43004983308660).

Almost surely, 2^{616846815661081} is an apocalyptic number.

It is an amenable number.

616846815661081 is a deficient number, since it is larger than the sum of its proper divisors (71232917277479).

616846815661081 is a wasteful number, since it uses less digits than its factorization.

616846815661081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590128184.

The product of its (nonzero) digits is 79626240, while the sum is 67.

The spelling of 616846815661081 in words is "six hundred sixteen trillion, eight hundred forty-six billion, eight hundred fifteen million, six hundred sixty-one thousand, eighty-one".