616871308660 has 12 divisors (see below), whose sum is σ = 1295429748228. Its totient is φ = 246748523456.

The previous prime is 616871308633. The next prime is 616871308687. The reversal of 616871308660 is 66803178616.

It is an interprime number because it is at equal distance from previous prime (616871308633) and next prime (616871308687).

It can be written as a sum of positive squares in 2 ways, for example, as 361025529316 + 255845779344 = 600854^2 + 505812^2 .

It is a super-2 number, since 2×616871308660² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 616871308598 and 616871308607.

It is a congruent number.

It is an unprimeable number.

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, 15421782697 + ... + 15421782736.

It is an arithmetic number, because the mean of its divisors is an integer number (107952479019).

Almost surely, 2^616871308660 is an apocalyptic number.

It is an amenable number.

616871308660 is an abundant number, since it is smaller than the sum of its proper divisors (678558439568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

616871308660 is a wasteful number, since it uses less digits than its factorization.

616871308660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30843565442 (or 30843565440 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 616871308660 in words is "six hundred sixteen billion, eight hundred seventy-one million, three hundred eight thousand, six hundred sixty".