616871808 has 256 divisors, whose sum is σ = 2132697600. Its totient is φ = 171859968.

The previous prime is 616871777. The next prime is 616871839. The reversal of 616871808 is 808178616.

It is an interprime number because it is at equal distance from previous prime (616871777) and next prime (616871839).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1039960 + ... + 1040552.

It is an arithmetic number, because the mean of its divisors is an integer number (8330850).

Almost surely, 2^616871808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 616871808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1066348800).

616871808 is an abundant number, since it is smaller than the sum of its proper divisors (1515825792).

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

616871808 is a wasteful number, since it uses less digits than its factorization.

616871808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 616871808 is about 24836.9041549063. The cubic root of 616871808 is about 851.2653854271.

The spelling of 616871808 in words is "six hundred sixteen million, eight hundred seventy-one thousand, eight hundred eight".