64783540 has 24 divisors (see below), whose sum is σ = 143206560. Its totient is φ = 24549408.

The previous prime is 64783519. The next prime is 64783547. The reversal of 64783540 is 4538746.

64783540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 64783540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64783547) 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 7 ways as a sum of consecutive naturals, for example, 84862 + ... + 85621.

It is an arithmetic number, because the mean of its divisors is an integer number (5966940).

Almost surely, 2^64783540 is an apocalyptic number.

It is an amenable number.

64783540 is an abundant number, since it is smaller than the sum of its proper divisors (78423020).

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

64783540 is a wasteful number, since it uses less digits than its factorization.

64783540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170511 (or 170509 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 64783540 is about 8048.8222740970. The cubic root of 64783540 is about 401.6257583226.

The spelling of 64783540 in words is "sixty-four million, seven hundred eighty-three thousand, five hundred forty".