53640783 has 24 divisors (see below), whose sum is σ = 88921248. Its totient is φ = 30523392.

The previous prime is 53640779. The next prime is 53640791. The reversal of 53640783 is 38704635.

It is a happy number.

53640783 is a `hidden beast` number, since 5 + 3 + 640 + 7 + 8 + 3 = 666.

It is not a de Polignac number, because 53640783 - 2² = 53640779 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53640733) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14535 + ... + 17847.

It is an arithmetic number, because the mean of its divisors is an integer number (3705052).

Almost surely, 2^53640783 is an apocalyptic number.

53640783 is a deficient number, since it is larger than the sum of its proper divisors (35280465).

53640783 is a wasteful number, since it uses less digits than its factorization.

53640783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3583 (or 3580 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 53640783 is about 7323.9868241280. The cubic root of 53640783 is about 377.1363291496.

The spelling of 53640783 in words is "fifty-three million, six hundred forty thousand, seven hundred eighty-three".