53365645 has 4 divisors (see below), whose sum is σ = 64038780. Its totient is φ = 42692512.

The previous prime is 53365643. The next prime is 53365649. The reversal of 53365645 is 54656335.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54656335 = 5 ⋅10931267.

It can be written as a sum of positive squares in 2 ways, for example, as 29833444 + 23532201 = 5462^2 + 4851^2 .

It is a cyclic number.

It is not a de Polignac number, because 53365645 - 2¹ = 53365643 is a prime.

It is a super-3 number, since 3×53365645³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53365643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5336560 + ... + 5336569.

It is an arithmetic number, because the mean of its divisors is an integer number (16009695).

Almost surely, 2^53365645 is an apocalyptic number.

It is an amenable number.

53365645 is a deficient number, since it is larger than the sum of its proper divisors (10673135).

53365645 is a wasteful number, since it uses less digits than its factorization.

53365645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10673134.

The product of its digits is 162000, while the sum is 37.

The square root of 53365645 is about 7305.1793270254. The cubic root of 53365645 is about 376.4904123125.

The spelling of 53365645 in words is "fifty-three million, three hundred sixty-five thousand, six hundred forty-five".