53261664 has 48 divisors (see below), whose sum is σ = 140216832. Its totient is φ = 17702528.

The previous prime is 53261647. The next prime is 53261701. The reversal of 53261664 is 46616235.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47737 + ... + 48839.

It is an arithmetic number, because the mean of its divisors is an integer number (2921184).

Almost surely, 2^53261664 is an apocalyptic number.

It is an amenable number.

53261664 is an abundant number, since it is smaller than the sum of its proper divisors (86955168).

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

53261664 is a wasteful number, since it uses less digits than its factorization.

53261664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619 (or 1611 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 53261664 is about 7298.0589200143. The cubic root of 53261664 is about 376.2457274085.

Adding to 53261664 its reverse (46616235), we get a palindrome (99877899).

The spelling of 53261664 in words is "fifty-three million, two hundred sixty-one thousand, six hundred sixty-four".