65459027138 has 18 divisors (see below), whose sum is σ = 99127071147. Its totient is φ = 32419609600.

The previous prime is 65459027129. The next prime is 65459027147. The reversal of 65459027138 is 83172095456.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (65459027129) and next prime (65459027147).

It can be written as a sum of positive squares in 5 ways, for example, as 38147167969 + 27311859169 = 195313^2 + 165263^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=180913.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 40885538 + ... + 40887138.

It is a 2-persistent number, because it is pandigital, and so is 2⋅65459027138 = 130918054276, but 3⋅65459027138 = 196377081414 is not.

Almost surely, 2^65459027138 is an apocalyptic number.

65459027138 is a deficient number, since it is larger than the sum of its proper divisors (33668044009).

65459027138 is an frugal number, since it uses more digits than its factorization.

65459027138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3430 (or 1716 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 50.

Multiplying 65459027138 by its sum of digits (50), we get a square (3272951356900 = 1809130²).

The spelling of 65459027138 in words is "sixty-five billion, four hundred fifty-nine million, twenty-seven thousand, one hundred thirty-eight".