51766164 has 18 divisors (see below), whose sum is σ = 130853450. Its totient is φ = 17255376.

The previous prime is 51766163. The next prime is 51766199. The reversal of 51766164 is 46166715.

51766164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 31136400 + 20629764 = 5580^2 + 4542^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1437949 = 51766164 / (5 + 1 + 7 + 6 + 6 + 1 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51766163) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 718939 + ... + 719010.

Almost surely, 2^51766164 is an apocalyptic number.

It is an amenable number.

51766164 is an abundant number, since it is smaller than the sum of its proper divisors (79087286).

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

51766164 is a wasteful number, since it uses less digits than its factorization.

51766164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437959 (or 1437954 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 51766164 is about 7194.8706729169. The cubic root of 51766164 is about 372.6907906607.

The spelling of 51766164 in words is "fifty-one million, seven hundred sixty-six thousand, one hundred sixty-four".