53018664 has 32 divisors (see below), whose sum is σ = 139524000. Its totient is φ = 16742592.

The previous prime is 53018653. The next prime is 53018681. The reversal of 53018664 is 46681035.

53018664 = T₃₇₇ + T₃₇₈ + ... + T₇₁₈.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57679 + ... + 58590.

It is an arithmetic number, because the mean of its divisors is an integer number (4360125).

Almost surely, 2^53018664 is an apocalyptic number.

It is an amenable number.

53018664 is an abundant number, since it is smaller than the sum of its proper divisors (86505336).

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

53018664 is a wasteful number, since it uses less digits than its factorization.

53018664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116297 (or 116293 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 53018664 is about 7281.3916252321. The cubic root of 53018664 is about 375.6726628998.

Adding to 53018664 its reverse (46681035), we get a palindrome (99699699).

The spelling of 53018664 in words is "fifty-three million, eighteen thousand, six hundred sixty-four".