65819138 has 64 divisors (see below), whose sum is σ = 134701056. Its totient is φ = 23328000.

The previous prime is 65819101. The next prime is 65819153. The reversal of 65819138 is 83191856.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65819095 and 65819104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80753 + ... + 81563.

It is an arithmetic number, because the mean of its divisors is an integer number (2104704).

Almost surely, 2^65819138 is an apocalyptic number.

65819138 is an abundant number, since it is smaller than the sum of its proper divisors (68881918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65819138 is a wasteful number, since it uses less digits than its factorization.

65819138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879.

The product of its digits is 51840, while the sum is 41.

The square root of 65819138 is about 8112.8994816896. The cubic root of 65819138 is about 403.7545195301.

The spelling of 65819138 in words is "sixty-five million, eight hundred nineteen thousand, one hundred thirty-eight".