51787660 has 48 divisors (see below), whose sum is σ = 111888000. Its totient is φ = 20127744.

The previous prime is 51787657. The next prime is 51787669. The reversal of 51787660 is 6678715.

51787660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51787669) 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 15 ways as a sum of consecutive naturals, for example, 115116 + ... + 115564.

It is an arithmetic number, because the mean of its divisors is an integer number (2331000).

Almost surely, 2^51787660 is an apocalyptic number.

It is an amenable number.

51787660 is an abundant number, since it is smaller than the sum of its proper divisors (60100340).

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

51787660 is a wasteful number, since it uses less digits than its factorization.

51787660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 51787660 is about 7196.3643598695. The cubic root of 51787660 is about 372.7423703797.

The spelling of 51787660 in words is "fifty-one million, seven hundred eighty-seven thousand, six hundred sixty".