51782664 has 32 divisors (see below), whose sum is σ = 132469920. Its totient is φ = 16859136.

The previous prime is 51782659. The next prime is 51782671. The reversal of 51782664 is 46628715.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24057 + ... + 26120.

It is an arithmetic number, because the mean of its divisors is an integer number (4139685).

Almost surely, 2^51782664 is an apocalyptic number.

It is an amenable number.

51782664 is an abundant number, since it is smaller than the sum of its proper divisors (80687256).

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

51782664 is a wasteful number, since it uses less digits than its factorization.

51782664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50229 (or 50225 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 51782664 is about 7196.0172317748. The cubic root of 51782664 is about 372.7303837355.

The spelling of 51782664 in words is "fifty-one million, seven hundred eighty-two thousand, six hundred sixty-four".