65215044137 has 8 divisors (see below), whose sum is σ = 66113993160. Its totient is φ = 64316246400.

The previous prime is 65215044107. The next prime is 65215044151. The reversal of 65215044137 is 73144051256.

It can be written as a sum of positive squares in 4 ways, for example, as 790959376 + 64424084761 = 28124^2 + 253819^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65215044137 - 2¹² = 65215040041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65215044137.

It is not an unprimeable number, because it can be changed into a prime (65215044107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1040387 + ... + 1101287.

It is an arithmetic number, because the mean of its divisors is an integer number (8264249145).

Almost surely, 2^65215044137 is an apocalyptic number.

It is an amenable number.

65215044137 is a deficient number, since it is larger than the sum of its proper divisors (898949023).

65215044137 is a wasteful number, since it uses less digits than its factorization.

65215044137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75643.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 65215044137 in words is "sixty-five billion, two hundred fifteen million, forty-four thousand, one hundred thirty-seven".