1629443228465 has 8 divisors (see below), whose sum is σ = 2105742018408. Its totient is φ = 1203281153280.

The previous prime is 1629443228419. The next prime is 1629443228471. The reversal of 1629443228465 is 5648223449261.

It can be written as a sum of positive squares in 4 ways, for example, as 50459984689 + 1578983243776 = 224633^2 + 1256576^2 .

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

It is not a de Polignac number, because 1629443228465 - 2¹⁰ = 1629443227441 is a prime.

It is a super-3 number, since 3×1629443228465³ (a number of 38 digits) contains 333 as substring.

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 1629443228465.

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, 12534178616 + ... + 12534178745.

It is an arithmetic number, because the mean of its divisors is an integer number (263217752301).

Almost surely, 2^{1629443228465} is an apocalyptic number.

It is an amenable number.

1629443228465 is a deficient number, since it is larger than the sum of its proper divisors (476298789943).

1629443228465 is a wasteful number, since it uses less digits than its factorization.

1629443228465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25068357379.

The product of its digits is 19906560, while the sum is 56.

The spelling of 1629443228465 in words is "one trillion, six hundred twenty-nine billion, four hundred forty-three million, two hundred twenty-eight thousand, four hundred sixty-five".