53406564 has 48 divisors (see below), whose sum is σ = 127659840. Its totient is φ = 17372160.

The previous prime is 53406557. The next prime is 53406593. The reversal of 53406564 is 46560435.

It is a super-2 number, since 2×53406564² = 5704522156572192, which contains 22 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170472 + ... + 170784.

It is an arithmetic number, because the mean of its divisors is an integer number (2659580).

Almost surely, 2^53406564 is an apocalyptic number.

It is an amenable number.

53406564 is an abundant number, since it is smaller than the sum of its proper divisors (74253276).

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

53406564 is a wasteful number, since it uses less digits than its factorization.

53406564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 53406564 is about 7307.9794745196. The cubic root of 53406564 is about 376.5866145000.

Adding to 53406564 its reverse (46560435), we get a palindrome (99966999).

The spelling of 53406564 in words is "fifty-three million, four hundred six thousand, five hundred sixty-four".