53768781 has 24 divisors (see below), whose sum is σ = 85565376. Its totient is φ = 32264640.

The previous prime is 53768777. The next prime is 53768789. The reversal of 53768781 is 18786735.

53768781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53768781 - 2² = 53768777 is a prime.

It is a super-2 number, since 2×53768781² = 5782163620451922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53768789) 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 23 ways as a sum of consecutive naturals, for example, 7561 + ... + 12833.

It is an arithmetic number, because the mean of its divisors is an integer number (3565224).

Almost surely, 2^53768781 is an apocalyptic number.

It is an amenable number.

53768781 is a deficient number, since it is larger than the sum of its proper divisors (31796595).

53768781 is a wasteful number, since it uses less digits than its factorization.

53768781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5393 (or 5390 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 53768781 is about 7332.7198910091. The cubic root of 53768781 is about 377.4360659529.

The spelling of 53768781 in words is "fifty-three million, seven hundred sixty-eight thousand, seven hundred eighty-one".