1663456594800 has 480 divisors, whose sum is σ = 7154497082880. Its totient is φ = 319064371200.

The previous prime is 1663456594799. The next prime is 1663456594831. The reversal of 1663456594800 is 84956543661.

It is a super-2 number, since 2×1663456594800² (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 95 ways as a sum of consecutive naturals, for example, 508786 + ... + 1893614.

It is an arithmetic number, because the mean of its divisors is an integer number (14905202256).

Almost surely, 2^{1663456594800} is an apocalyptic number.

1663456594800 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 1663456594800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3577248541440).

1663456594800 is an abundant number, since it is smaller than the sum of its proper divisors (5491040488080).

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

1663456594800 is a wasteful number, since it uses less digits than its factorization.

1663456594800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384881 (or 1384870 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 57.

The spelling of 1663456594800 in words is "one trillion, six hundred sixty-three billion, four hundred fifty-six million, five hundred ninety-four thousand, eight hundred".