51604416 has 42 divisors (see below), whose sum is σ = 147916392. Its totient is φ = 17201280.

The previous prime is 51604411. The next prime is 51604417. The reversal of 51604416 is 61440615.

51604416 is a `hidden beast` number, since 51 + 604 + 4 + 1 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 51604416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51604411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44220 + ... + 45371.

Almost surely, 2^51604416 is an apocalyptic number.

It is an amenable number.

51604416 is an abundant number, since it is smaller than the sum of its proper divisors (96311976).

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

51604416 is a wasteful number, since it uses less digits than its factorization.

51604416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89609 (or 89596 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 51604416 is about 7183.6213708686. The cubic root of 51604416 is about 372.3022171213.

The spelling of 51604416 in words is "fifty-one million, six hundred four thousand, four hundred sixteen".