616523856 has 160 divisors (see below), whose sum is σ = 1822800000. Its totient is φ = 177997824.

The previous prime is 616523851. The next prime is 616523857. The reversal of 616523856 is 658325616.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616523851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1766370 + ... + 1766718.

It is an arithmetic number, because the mean of its divisors is an integer number (11392500).

Almost surely, 2^616523856 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 616523856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (911400000).

616523856 is an abundant number, since it is smaller than the sum of its proper divisors (1206276144).

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

616523856 is a wasteful number, since it uses less digits than its factorization.

616523856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 535 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The square root of 616523856 is about 24829.8984291116. The cubic root of 616523856 is about 851.1053007340.

The spelling of 616523856 in words is "six hundred sixteen million, five hundred twenty-three thousand, eight hundred fifty-six".