51606648 has 48 divisors (see below), whose sum is σ = 141027120. Its totient is φ = 17047296.

The previous prime is 51606637. The next prime is 51606691. The reversal of 51606648 is 84660615.

51606648 is a `hidden beast` number, since 5 + 1 + 6 + 0 + 6 + 648 = 666.

51606648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51606648² = 5326492235591808, which contains 22 as substring.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4965 + ... + 11307.

It is an arithmetic number, because the mean of its divisors is an integer number (2938065).

Almost surely, 2^51606648 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 51606648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70513560).

51606648 is an abundant number, since it is smaller than the sum of its proper divisors (89420472).

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

51606648 is a wasteful number, since it uses less digits than its factorization.

51606648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6468 (or 6461 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 51606648 is about 7183.7767225882. The cubic root of 51606648 is about 372.3075846630.

The spelling of 51606648 in words is "fifty-one million, six hundred six thousand, six hundred forty-eight".