65945138 has 32 divisors (see below), whose sum is σ = 116823168. Its totient is φ = 27331200.

The previous prime is 65945107. The next prime is 65945147. The reversal of 65945138 is 83154956.

It is a super-4 number, since 4×65945138⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a junction number, because it is equal to n+sod(n) for n = 65945095 and 65945104.

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, 74756 + ... + 75632.

It is an arithmetic number, because the mean of its divisors is an integer number (3650724).

Almost surely, 2^65945138 is an apocalyptic number.

65945138 is a deficient number, since it is larger than the sum of its proper divisors (50878030).

65945138 is a wasteful number, since it uses less digits than its factorization.

65945138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058.

The product of its digits is 129600, while the sum is 41.

The square root of 65945138 is about 8120.6611799779. The cubic root of 65945138 is about 404.0119960167.

The spelling of 65945138 in words is "sixty-five million, nine hundred forty-five thousand, one hundred thirty-eight".