53765681 has 8 divisors (see below), whose sum is σ = 56142720. Its totient is φ = 51423568.

The previous prime is 53765659. The next prime is 53765707. The reversal of 53765681 is 18656735.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53765681 is a prime.

It is a super-2 number, since 2×53765681² = 5781496906787522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53765081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5561 + ... + 11766.

It is an arithmetic number, because the mean of its divisors is an integer number (7017840).

Almost surely, 2^53765681 is an apocalyptic number.

It is an amenable number.

53765681 is a deficient number, since it is larger than the sum of its proper divisors (2377039).

53765681 is a wasteful number, since it uses less digits than its factorization.

53765681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17463.

The product of its digits is 151200, while the sum is 41.

The square root of 53765681 is about 7332.5085066435. The cubic root of 53765681 is about 377.4288122128.

The spelling of 53765681 in words is "fifty-three million, seven hundred sixty-five thousand, six hundred eighty-one".