1228835650065 has 16 divisors (see below), whose sum is σ = 1966319534400. Its totient is φ = 655318181952.

The previous prime is 1228835650033. The next prime is 1228835650069. The reversal of 1228835650065 is 5600565388221.

It is a happy number.

It is not a de Polignac number, because 1228835650065 - 2⁵ = 1228835650033 is a prime.

It is a super-2 number, since 2×1228835650065² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1228835650069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3634735 + ... + 3958404.

It is an arithmetic number, because the mean of its divisors is an integer number (122894970900).

Almost surely, 2^{1228835650065} is an apocalyptic number.

1228835650065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1228835650065 is a deficient number, since it is larger than the sum of its proper divisors (737483884335).

1228835650065 is a wasteful number, since it uses less digits than its factorization.

1228835650065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7603936.

The product of its (nonzero) digits is 3456000, while the sum is 51.

The spelling of 1228835650065 in words is "one trillion, two hundred twenty-eight billion, eight hundred thirty-five million, six hundred fifty thousand, sixty-five".