65540045 has 16 divisors (see below), whose sum is σ = 82114560. Its totient is φ = 50160000.

The previous prime is 65540039. The next prime is 65540089. The reversal of 65540045 is 54004556.

It is not a de Polignac number, because 65540045 - 2¹⁰ = 65539021 is a prime.

It is a Curzon number.

It is a congruent number.

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, 11420 + ... + 16170.

It is an arithmetic number, because the mean of its divisors is an integer number (5132160).

Almost surely, 2^65540045 is an apocalyptic number.

It is an amenable number.

65540045 is a deficient number, since it is larger than the sum of its proper divisors (16574515).

65540045 is a wasteful number, since it uses less digits than its factorization.

65540045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4876.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 65540045 is about 8095.6806384639. The cubic root of 65540045 is about 403.1830306861.

The spelling of 65540045 in words is "sixty-five million, five hundred forty thousand, forty-five".