53445564 has 36 divisors (see below), whose sum is σ = 136445400. Its totient is φ = 17637600.

The previous prime is 53445547. The next prime is 53445589. The reversal of 53445564 is 46554435.

53445564 is a `hidden beast` number, since 53 + 4 + 45 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×53445564² = 5712856622556192, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3714 + ... + 10985.

It is an arithmetic number, because the mean of its divisors is an integer number (3790150).

Almost surely, 2^53445564 is an apocalyptic number.

It is an amenable number.

53445564 is an abundant number, since it is smaller than the sum of its proper divisors (82999836).

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

53445564 is a wasteful number, since it uses less digits than its factorization.

53445564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14810 (or 14805 counting only the distinct ones).

The product of its digits is 144000, while the sum is 36.

The square root of 53445564 is about 7310.6473037618. The cubic root of 53445564 is about 376.6782593172.

Adding to 53445564 its reverse (46554435), we get a palindrome (99999999).

The spelling of 53445564 in words is "fifty-three million, four hundred forty-five thousand, five hundred sixty-four".