616425408 has 84 divisors (see below), whose sum is σ = 1791876528. Its totient is φ = 202567680.

The previous prime is 616425373. The next prime is 616425431. The reversal of 616425408 is 804524616.

616425408 is a `hidden beast` number, since 6 + 1 + 642 + 5 + 4 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33360 + ... + 48432.

Almost surely, 2^616425408 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 616425408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (895938264).

616425408 is an abundant number, since it is smaller than the sum of its proper divisors (1175451120).

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

616425408 is a wasteful number, since it uses less digits than its factorization.

616425408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15162 (or 15149 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 616425408 is about 24827.9159012592. The cubic root of 616425408 is about 851.0599961476.

The spelling of 616425408 in words is "six hundred sixteen million, four hundred twenty-five thousand, four hundred eight".