51648156 has 216 divisors, whose sum is σ = 169303680. Its totient is φ = 13172544.

The previous prime is 51648143. The next prime is 51648173. The reversal of 51648156 is 65184615.

51648156 is a `hidden beast` number, since 5 + 1 + 648 + 1 + 5 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51648156.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 770835 + ... + 770901.

Almost surely, 2^51648156 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 51648156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84651840).

51648156 is an abundant number, since it is smaller than the sum of its proper divisors (117655524).

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

51648156 is a wasteful number, since it uses less digits than its factorization.

51648156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 121 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 51648156 is about 7186.6651515150. The cubic root of 51648156 is about 372.4073754357.

The spelling of 51648156 in words is "fifty-one million, six hundred forty-eight thousand, one hundred fifty-six".