65504138 has 16 divisors (see below), whose sum is σ = 117175680. Its totient is φ = 26852496.

The previous prime is 65504119. The next prime is 65504143. The reversal of 65504138 is 83140556.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101393 + ... + 102036.

It is an arithmetic number, because the mean of its divisors is an integer number (7323480).

Almost surely, 2^65504138 is an apocalyptic number.

65504138 is a deficient number, since it is larger than the sum of its proper divisors (51671542).

65504138 is a wasteful number, since it uses less digits than its factorization.

65504138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203461.

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

The square root of 65504138 is about 8093.4626705756. The cubic root of 65504138 is about 403.1093874770.

The spelling of 65504138 in words is "sixty-five million, five hundred four thousand, one hundred thirty-eight".