65444554898 has 18 divisors (see below), whose sum is σ = 100912337631. Its totient is φ = 31831379424.

The previous prime is 65444554859. The next prime is 65444554907. The reversal of 65444554898 is 89845544456.

65444554898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 64426115329 + 1018439569 = 253823^2 + 31913^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=180893.

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 65444554898.

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, 13383638 + ... + 13388526.

Almost surely, 2^65444554898 is an apocalyptic number.

65444554898 is a deficient number, since it is larger than the sum of its proper divisors (35467782733).

65444554898 is an frugal number, since it uses more digits than its factorization.

65444554898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9854 (or 4928 counting only the distinct ones).

The product of its digits is 110592000, while the sum is 62.

The spelling of 65444554898 in words is "sixty-five billion, four hundred forty-four million, five hundred fifty-four thousand, eight hundred ninety-eight".