1428220656465 has 16 divisors (see below), whose sum is σ = 2405424264000. Its totient is φ = 721627278912.

The previous prime is 1428220656461. The next prime is 1428220656469. The reversal of 1428220656465 is 5646560228241.

It is an interprime number because it is at equal distance from previous prime (1428220656461) and next prime (1428220656469).

It is not a de Polignac number, because 1428220656465 - 2² = 1428220656461 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1428220656461) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2505649990 + ... + 2505650559.

It is an arithmetic number, because the mean of its divisors is an integer number (150339016500).

Almost surely, 2^{1428220656465} is an apocalyptic number.

1428220656465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1428220656465 is a deficient number, since it is larger than the sum of its proper divisors (977203607535).

1428220656465 is a wasteful number, since it uses less digits than its factorization.

1428220656465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011300576.

The product of its (nonzero) digits is 5529600, while the sum is 51.

The spelling of 1428220656465 in words is "one trillion, four hundred twenty-eight billion, two hundred twenty million, six hundred fifty-six thousand, four hundred sixty-five".