1641924788544 has 168 divisors, whose sum is σ = 4873756279392. Its totient is φ = 528138777600.

The previous prime is 1641924788533. The next prime is 1641924788561. The reversal of 1641924788544 is 4458874291461.

1641924788544 is a `hidden beast` number, since 1 + 6 + 4 + 1 + 9 + 2 + 4 + 7 + 88 + 544 = 666.

It is a super-2 number, since 2×1641924788544² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1656394 + ... + 2455094.

It is an arithmetic number, because the mean of its divisors is an integer number (29010454044).

Almost surely, 2^{1641924788544} 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 1641924788544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2436878139696).

1641924788544 is an abundant number, since it is smaller than the sum of its proper divisors (3231831490848).

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

1641924788544 is a wasteful number, since it uses less digits than its factorization.

1641924788544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798845 (or 798832 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 63.

The spelling of 1641924788544 in words is "one trillion, six hundred forty-one billion, nine hundred twenty-four million, seven hundred eighty-eight thousand, five hundred forty-four".