1620394870848 has 448 divisors, whose sum is σ = 4938826556160. Its totient is φ = 464469884928.

The previous prime is 1620394870847. The next prime is 1620394870859. The reversal of 1620394870848 is 8480784930261.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1620394870791 and 1620394870800.

It is not an unprimeable number, because it can be changed into a prime (1620394870847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2407718640 + ... + 2407719312.

It is an arithmetic number, because the mean of its divisors is an integer number (11024166420).

Almost surely, 2^{1620394870848} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620394870848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2469413278080).

1620394870848 is an abundant number, since it is smaller than the sum of its proper divisors (3318431685312).

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

1620394870848 is a wasteful number, since it uses less digits than its factorization.

1620394870848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214 (or 1204 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 60.

The spelling of 1620394870848 in words is "one trillion, six hundred twenty billion, three hundred ninety-four million, eight hundred seventy thousand, eight hundred forty-eight".