65641853 has 4 divisors (see below), whose sum is σ = 65678880. Its totient is φ = 65604828.

The previous prime is 65641847. The next prime is 65641867. The reversal of 65641853 is 35814656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65641853 - 2¹⁰ = 65640829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65641553) 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, 15713 + ... + 19446.

It is an arithmetic number, because the mean of its divisors is an integer number (16419720).

Almost surely, 2^65641853 is an apocalyptic number.

It is an amenable number.

65641853 is a deficient number, since it is larger than the sum of its proper divisors (37027).

65641853 is a wasteful number, since it uses less digits than its factorization.

65641853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37026.

The product of its digits is 86400, while the sum is 38.

The square root of 65641853 is about 8101.9659959790. The cubic root of 65641853 is about 403.3916869483.

The spelling of 65641853 in words is "sixty-five million, six hundred forty-one thousand, eight hundred fifty-three".