163344790978560 has 2016 divisors, whose sum is σ = 623839271166720. Its totient is φ = 40972478054400.

The previous prime is 163344790978531. The next prime is 163344790978583. The reversal of 163344790978560 is 65879097443361.

163344790978560 is a `hidden beast` number, since 1 + 6 + 3 + 3 + 4 + 479 + 0 + 97 + 8 + 5 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

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 111 ways as a sum of consecutive naturals, for example, 607229706106 + ... + 607229706374.

It is an arithmetic number, because the mean of its divisors is an integer number (309444082920).

Almost surely, 2^{163344790978560} is an apocalyptic number.

163344790978560 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 163344790978560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311919635583360).

163344790978560 is an abundant number, since it is smaller than the sum of its proper divisors (460494480188160).

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

163344790978560 is an frugal number, since it uses more digits than its factorization.

163344790978560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 823011840, while the sum is 72.

The spelling of 163344790978560 in words is "one hundred sixty-three trillion, three hundred forty-four billion, seven hundred ninety million, nine hundred seventy-eight thousand, five hundred sixty".