51773664 has 24 divisors (see below), whose sum is σ = 135906120. Its totient is φ = 17257856.

The previous prime is 51773663. The next prime is 51773681. The reversal of 51773664 is 46637715.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51773663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269559 + ... + 269750.

It is an arithmetic number, because the mean of its divisors is an integer number (5662755).

Almost surely, 2^51773664 is an apocalyptic number.

It is an amenable number.

51773664 is an abundant number, since it is smaller than the sum of its proper divisors (84132456).

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

51773664 is a wasteful number, since it uses less digits than its factorization.

51773664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539322 (or 539314 counting only the distinct ones).

The product of its digits is 105840, while the sum is 39.

The square root of 51773664 is about 7195.3918586829. The cubic root of 51773664 is about 372.7087885557.

The spelling of 51773664 in words is "fifty-one million, seven hundred seventy-three thousand, six hundred sixty-four".