65641145 has 16 divisors (see below), whose sum is σ = 81350400. Its totient is φ = 50808384.

The previous prime is 65641139. The next prime is 65641157. The reversal of 65641145 is 54114656.

It is a cyclic number.

It is not a de Polignac number, because 65641145 - 2⁸ = 65640889 is a prime.

It is a super-2 number, since 2×65641145² = 8617519833822050, which contains 22 as substring.

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, 35924 + ... + 37706.

It is an arithmetic number, because the mean of its divisors is an integer number (5084400).

Almost surely, 2^65641145 is an apocalyptic number.

It is an amenable number.

65641145 is a deficient number, since it is larger than the sum of its proper divisors (15709255).

65641145 is a wasteful number, since it uses less digits than its factorization.

65641145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024.

The product of its digits is 14400, while the sum is 32.

The square root of 65641145 is about 8101.9223027625. The cubic root of 65641145 is about 403.3902366422.

The spelling of 65641145 in words is "sixty-five million, six hundred forty-one thousand, one hundred forty-five".