616889856 has 160 divisors (see below), whose sum is σ = 1856131200. Its totient is φ = 180346880.

The previous prime is 616889849. The next prime is 616889881. The reversal of 616889856 is 658988616.

It is a junction number, because it is equal to n+sod(n) for n = 616889796 and 616889805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 489355 + ... + 490613.

It is an arithmetic number, because the mean of its divisors is an integer number (11600820).

Almost surely, 2^616889856 is an apocalyptic number.

616889856 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 616889856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (928065600).

616889856 is an abundant number, since it is smaller than the sum of its proper divisors (1239241344).

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

616889856 is a wasteful number, since it uses less digits than its factorization.

616889856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320 (or 1304 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 57.

The square root of 616889856 is about 24837.2674825553. The cubic root of 616889856 is about 851.2736872534.

The spelling of 616889856 in words is "six hundred sixteen million, eight hundred eighty-nine thousand, eight hundred fifty-six".