169421918077440 has 1600 divisors, whose sum is σ = 703817890414848. Its totient is φ = 38152912896000.

The previous prime is 169421918077421. The next prime is 169421918077441. The reversal of 169421918077440 is 44770819124961.

169421918077440 is a `hidden beast` number, since 1 + 6 + 9 + 4 + 2 + 1 + 9 + 180 + 7 + 7 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (169421918077441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 30933339982 + ... + 30933345458.

Almost surely, 2^{169421918077440} is an apocalyptic number.

169421918077440 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 169421918077440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351908945207424).

169421918077440 is an abundant number, since it is smaller than the sum of its proper divisors (534395972337408).

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

169421918077440 is a wasteful number, since it uses less digits than its factorization.

169421918077440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5831 (or 5806 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 63.

The spelling of 169421918077440 in words is "one hundred sixty-nine trillion, four hundred twenty-one billion, nine hundred eighteen million, seventy-seven thousand, four hundred forty".