53705645 has 16 divisors (see below), whose sum is σ = 73970688. Its totient is φ = 36668160.

The previous prime is 53705627. The next prime is 53705683. The reversal of 53705645 is 54650735.

It is not a de Polignac number, because 53705645 - 2¹⁶ = 53640109 is a prime.

It is a super-3 number, since 3×53705645³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5252 + ... + 11618.

It is an arithmetic number, because the mean of its divisors is an integer number (4623168).

Almost surely, 2^53705645 is an apocalyptic number.

It is an amenable number.

53705645 is a deficient number, since it is larger than the sum of its proper divisors (20265043).

53705645 is a wasteful number, since it uses less digits than its factorization.

53705645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6620.

The product of its (nonzero) digits is 63000, while the sum is 35.

The square root of 53705645 is about 7328.4135390956. The cubic root of 53705645 is about 377.2882779850.

The spelling of 53705645 in words is "fifty-three million, seven hundred five thousand, six hundred forty-five".