1444555001620 has 96 divisors (see below), whose sum is σ = 3137852662560. Its totient is φ = 558238556160.

The previous prime is 1444555001611. The next prime is 1444555001629. The reversal of 1444555001620 is 261005554441.

It is an interprime number because it is at equal distance from previous prime (1444555001611) and next prime (1444555001629).

It can be written as a sum of positive squares in 16 ways, for example, as 1221427253124 + 223127748496 = 1105182^2 + 472364^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1444555001620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444555001629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 210665232 + ... + 210672088.

It is an arithmetic number, because the mean of its divisors is an integer number (32685965235).

Almost surely, 2^{1444555001620} is an apocalyptic number.

1444555001620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1444555001620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1568926331280).

1444555001620 is an abundant number, since it is smaller than the sum of its proper divisors (1693297660940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1444555001620 is a wasteful number, since it uses less digits than its factorization.

1444555001620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9373 (or 9371 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 37.

The spelling of 1444555001620 in words is "one trillion, four hundred forty-four billion, five hundred fifty-five million, one thousand, six hundred twenty".