53661718 has 16 divisors (see below), whose sum is σ = 87932880. Its totient is φ = 24357600.

The previous prime is 53661709. The next prime is 53661763. The reversal of 53661718 is 81716635.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21268 + ... + 23656.

It is an arithmetic number, because the mean of its divisors is an integer number (5495805).

Almost surely, 2^53661718 is an apocalyptic number.

53661718 is a deficient number, since it is larger than the sum of its proper divisors (34271162).

53661718 is a wasteful number, since it uses less digits than its factorization.

53661718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3423.

The product of its digits is 30240, while the sum is 37.

The square root of 53661718 is about 7325.4158926303. The cubic root of 53661718 is about 377.1853858666.

It can be divided in two parts, 536617 and 18, that added together give a palindrome (536635).

The spelling of 53661718 in words is "fifty-three million, six hundred sixty-one thousand, seven hundred eighteen".