51646104 has 72 divisors (see below), whose sum is σ = 147698460. Its totient is φ = 16301088.

The previous prime is 51646103. The next prime is 51646121. The reversal of 51646104 is 40164615.

51646104 is a `hidden beast` number, since 5 + 1 + 646 + 10 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51646103) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 24999 + ... + 26985.

Almost surely, 2^51646104 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 51646104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73849230).

51646104 is an abundant number, since it is smaller than the sum of its proper divisors (96052356).

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

51646104 is a wasteful number, since it uses less digits than its factorization.

51646104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2037 (or 2011 counting only the distinct ones).

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

The square root of 51646104 is about 7186.5223856884. The cubic root of 51646104 is about 372.4024434103.

The spelling of 51646104 in words is "fifty-one million, six hundred forty-six thousand, one hundred four".