65612454065 has 8 divisors (see below), whose sum is σ = 79619607720. Its totient is φ = 51900188032.

The previous prime is 65612453999. The next prime is 65612454071. The reversal of 65612454065 is 56045421656.

It can be written as a sum of positive squares in 4 ways, for example, as 10417060096 + 55195393969 = 102064^2 + 234937^2 .

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 65612454065 - 2²⁴ = 65595676849 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73721414 + ... + 73722303.

It is an arithmetic number, because the mean of its divisors is an integer number (9952450965).

Almost surely, 2^65612454065 is an apocalyptic number.

It is an amenable number.

65612454065 is a deficient number, since it is larger than the sum of its proper divisors (14007153655).

65612454065 is a wasteful number, since it uses less digits than its factorization.

65612454065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147443811.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 65612454065 in words is "sixty-five billion, six hundred twelve million, four hundred fifty-four thousand, sixty-five".